Stealing Baseball Signs with a Phone (Machine Learning)

I always sucked at baseball... until now... ok, I still probably suck. Go to and use code MARKROBER to get 75% off a 3 year plan and an extra month for free.
Go subscribe to Jabril's channel!!!
Simple app (it's actually just a webpage for now):
Complex app using ML:
CORRECTION: I said in ad portion of the video that my data could be stolen on unprotected WiFi. This is true but in the example I gave with HRgo which uses HTTPS it’s already encrypted. Sorry. Didn’t know that’s how it worked. I will correct that in any future ads with Nord.

0:29 Dansez - Fasion
1:01 Dive - Lvly
2:19 Dansez - Fasion
4:16 Kalimba Jam - Blue Wednesday
5:23 Take Me Out to the Ballgame -Matt Cherne-
7:04 Arrow - Andrew Applepie
8:18 Cereal Killa - Blue Wednesday
11:16 Salamanca - Sarah, the Illstrumentalist
13:12 Q - Blue Wednesday
14:18 Too Happy to be cool - Notebreak

Summary: I wanted to see if I could make an app that could decode baseball signs. Turns out we could and it was a great opportunity for me to learn more about Machine Learning and neural networks and artificial intelligence from my friend Jabril.

They are soft-

I make videos like this once a month all year long while supplies last:
TWITTER: #!/MarkRober
INSTAGRAM: markrober


  1. Ac S

    Ac SPrije 12 sati

    <a href="#" class="seekto" data-time="341">5:41</a> turn on captions when jabril says but it spells as butt. XD

  2. gambino 31406

    gambino 31406Prije 12 sati

    Theres no way the app could crack our signs

  3. Patti Graley

    Patti GraleyPrije 13 sati

    The only thing that is intelligent was the bird sign like Pure Smartness I shall STEAL that idea and use that Does anyone realize the joke no one okay it was a gas joke

  4. NooLooPhoeni

    NooLooPhoeniPrije 14 sati


  5. Steven Enright

    Steven EnrightPrije 14 sati

    I clicked on this video just to see the comments about the Astros

  6. Steven Enright

    Steven EnrightPrije 14 sati

    I clicked on this video just to see the comments about the Astros

  7. Mirrix

    MirrixPrije 14 sati

    I play 12u aaa baseball and we don’t have a indicator

  8. thebigcnel

    thebigcnelPrije 16 sati

    Your chick friend is super hot

  9. 1 million subs with no videos

    1 million subs with no videosPrije 16 sati

    Where de astros at

  10. vincent28

    vincent28Prije 17 sati

    mark using minecraft sound effects like crazy haha

  11. Dave Roth

    Dave RothPrije 18 sati

    And not a single watermelon was sacrificed this go round.

  12. Peter Masi

    Peter MasiPrije 18 sati

    Marks friend never asked about the right eyebrow cancel rub

  13. hernandez gameing 2.0

    hernandez gameing 2.0Prije 18 sati

    No I unsup

  14. Alex V

    Alex VPrije 18 sati

    Just realized after a year thats my mf school LMFAO

  15. B Loh

    B LohPrije 19 sati

    Astros have entered the chat

  16. Hardcore Prison

    Hardcore PrisonPrije 19 sati


  17. Black Coffee

    Black CoffeePrije 19 sati

    As a european i was wondering what a phone has to do with stealing baseball signs, or any sign.

  18. King NightWolf5022

    King NightWolf5022Prije 20 sati

    Mark balancing a flamethrower in his hand what a savage

  19. Unspankable Gaming

    Unspankable GamingPrije 20 sati


  20. Dominic G

    Dominic GPrije 20 sati

    Back when I played little league, probably fifteen years or so ago, we’d call out “dancing coaches,” and based on who they called out to first and process of elimination, we’d pretty reliably determine the call. It should be noted out area doesn’t really do fluff signaling - if they do something they made a signal.

  21. Jackson Wood

    Jackson WoodPrije 21 sat


  22. Pudding #1

    Pudding #1Prije 21 sat

    The astros mustve watched this

  23. g w

    g wPrije 22 sati

    Do all the signs you want in the world, and the steal sign is the number of times you nod your head in the sequence. positive or odd for yes or no

  24. Beckham Nielsen

    Beckham NielsenPrije 22 sati

    <a href="#" class="seekto" data-time="198">3:18</a> that’s a Bach hahaha lol

  25. Roy R

    Roy RPrije 23 sati

    Look, that’s cool and all, but what’s Sarah’s number?

  26. Charlotte Chiraghuddin

    Charlotte ChiraghuddinPrije 23 sati

    It’s crazy, pretty much every method used in this video is something we learnt in maths while some kid was shouting “when are we ever gonna need this”

  27. Jackson Reese

    Jackson ReesePrije dan

    The astros must have watched this video

  28. Ahm u.k

    Ahm u.kPrije dan

    the astros send their regards

  29. IG mycalicrush

    IG mycalicrushPrije dan

    Does anyone know where this was? I’m in love with the accent

  30. Fahim Anjum

    Fahim AnjumPrije dan

    To say that our brain work like NN is not the whole picture man. What you are saying is like NN is what happens in brains but in reality our brain can do simple problems in simple way like solving a linear system, and complex problem in complex way like ...You know better examples than me. NN treats every problem as a nonlinear problem. Let's not get ahead of us

  31. Suburp212

    Suburp212Prije dan

    Great idea . My new fave channel. Thanks, Mark.

  32. Issy Guinn

    Issy GuinnPrije dan

    Good job at that it is so cool

  33. Nard & Kick

    Nard & KickPrije dan

    Did the Astros use this app

  34. King Khan

    King KhanPrije dan

    I was hoping for some ASTROS comments. Yall did not disappoint!

  35. Gamer Rihan

    Gamer RihanPrije dan

    <a href="#" class="seekto" data-time="785">13:05</a> haha

  36. I.Pee.Solids

    I.Pee.SolidsPrije dan

    <a href="#" class="seekto" data-time="731">12:11</a> captions say Destin says "I got in trouble for stealing sons"

  37. Team Tri Squad To win

    Team Tri Squad To winPrije dan

    <a href="#" class="seekto" data-time="591">9:51</a> are those minecraft sounds???

  38. Clashgamer X2

    Clashgamer X2Prije dan

    "I get in Trouble for stealing sons." Nice.

  39. Elitez Echo

    Elitez EchoPrije dan

    now we know that the astros

  40. Niccster10

    Niccster10Prije dan

    You forgot about different neuron configurations. Like ones used to compress a set of data

  41. allen liu

    allen liuPrije dan

    I wonder if this is banned in base ball fields now.

  42. Dark Mavidson

    Dark MavidsonPrije dan

    Say with 1 out the sign is the first touch after the indicator but with 2 outs the sign is the second touch after the indicator. It can get more complicated if you use ball-strike count related indicator-sign pairings... Anyway, would more information have to be input for it to consider these varying sequences?

  43. Max Fritsch

    Max FritschPrije dan

    Only if the astros could have used this

  44. Drayton Linen

    Drayton LinenPrije dan

    my brain hurts

  45. Esther or Rachel Hodge

    Esther or Rachel HodgePrije dan

    What happened to the right eyebrow tap negates everything that came before it?

  46. Dave Leone

    Dave LeonePrije dan

    <a href="#" class="seekto" data-time="555">9:15</a> minecraft swith noise

  47. MrMcMooshroom

    MrMcMooshroomPrije dan

    <a href="#" class="seekto" data-time="210">3:30</a> bruh

  48. Team Raza

    Team RazaPrije dan

    What does hax mean I am only 9 years old and trying to do in your website and I don’t know what it meant

  49. Idk But ok

    Idk But okPrije dan


  50. Emelia Bolen

    Emelia BolenPrije dan

    kids are the best!!

  51. Dvance

    DvancePrije dan

    I taught myself how to code when I was 7.

  52. Ocean Willems

    Ocean WillemsPrije dan

    It’s the ear i did it first try if she touch her ear steal no ear no steal

  53. Official Hanan

    Official HananPrije dan

    Subscribed when I found out he sneaky filmed things

  54. JhonIsOkayIGuess

    JhonIsOkayIGuessPrije dan

    I learn more from this channel then I do from school.


    YASSINE MESSPrije dan

    I don’t know how baseball works but this is still cool

  56. Taverz

    TaverzPrije dan

    The astro's and mark should colab.

  57. Griffin Simpson

    Griffin SimpsonPrije dan

    The "special sign of their own" was actually a balk... aka an illegal play

  58. Weston Ball

    Weston BallPrije dan

    Tv mark

  59. Johnnytan

    JohnnytanPrije dan

    The Houston astros would love this app

  60. Mara Pineda

    Mara PinedaPrije 2 dana

    Anyone else watch this after space launch live? EDIT I did not finish it but I am done now props to Mark for presenting and explaining so well :)

  61. Artie McCallum

    Artie McCallumPrije dan

    I did

  62. Epicplanes 2

    Epicplanes 2Prije 2 dana

    People talking about Astros cheating we not gonna talk about Patriots cheating?

  63. EberhardyTube

    EberhardyTubePrije 2 dana

    My boi Jabrils drinking the La Croix

  64. Patrick PK

    Patrick PKPrije 2 dana


  65. Jm Valmores

    Jm ValmoresPrije 2 dana

    Mlb players: oh were not cheaters astros: sure thats nice were kinda trash tho

  66. Netzuo

    NetzuoPrije 2 dana

    The Priest In The Church: *"does a sign of the cross"* Me: *ITS A STEAL!!!*

  67. Chandler Bing

    Chandler BingPrije 13 sati


  68. aiden lawrence

    aiden lawrencePrije 2 dana

    What’s the app

  69. Free Fall

    Free FallPrije 2 dana

    Its in the description

  70. Legotronforce

    LegotronforcePrije 2 dana

    Jabrils, his mouth is moving .-. I am scarred forever :/

  71. justessam

    justessamPrije 2 dana

    Im not a american so i thought they were gonna steal the ball and run away

  72. supreme 21

    supreme 21Prije 2 dana

    Bruh this is how a safe works <a href="#" class="seekto" data-time="595">9:55</a>

  73. First Name Last Name

    First Name Last NamePrije 2 dana

    Code Bullet would like to know your location.

  74. Kanye Fuller

    Kanye FullerPrije 2 dana

    Jabrils you traitor. You used your mouth.

  75. RED-ATTACK. Gaming

    RED-ATTACK. GamingPrije 2 dana

    The astros called they want their idea back

  76. A Shaf

    A ShafPrije 2 dana

    Why don't they just let baseball players wear a small microphone receiver and just tell them what to do....

  77. Jake Mager

    Jake MagerPrije 2 dana

    now the Astros don't need trash cans!!!

  78. FE444R YT

    FE444R YTPrije 2 dana

    brooooo timmy just made me a genius

  79. Dr. Z

    Dr. ZPrije 2 dana

    <a href="#" class="seekto" data-time="197">3:17</a> lol that’s definitely a balk

  80. The Legendary Poob

    The Legendary PoobPrije 2 dana

    bet if someone is gonna steal or not but cheat and win tons of cash

  81. Joey isamazing

    Joey isamazingPrije 2 dana

    Can this code account for multiple wipe offs where there are signs that mean ignore everything else? I’ve played on competitive teams where we would have multiple signs that would cancel either everything from before,after or immediately before or after. And we would occasionally have situations where we would be told verbally before going up to bat what to do for example bunt and the third base coach wouldn’t sign but but we would anyways to prevent the other team from figuring it out?

  82. Daedree Gangano

    Daedree GanganoPrije 2 dana

    every time I watch a video I lose some braincells but I think losing my braincells was worth my entertainment

  83. Wyatt Christenson

    Wyatt ChristensonPrije 2 dana

    How to get money from sports peting