Plinko is almost impossible to win in, if you ask me. I tried it several times and it was never lucky for me.
I don’t know how anyone would buy such videos. Gambling is based almost purely on luck, not to say - one’s personal luck. How exactly could someone “teach” me through a video how to win in a game?
Not impossible to win, but the greed is the actual problem. Let's say you got lucky, hitting the x1000 in the highest difficulty of Plinko and got it for just 100 balls that you dropped. (This happens, I know it because it did happen to me.) The problem is, are we going to stop, or will we continue? Most of the time, a gambler will continue with the thought of being lucky that day. That's when the possible becomes impossible because we are hungry for more, and there's a high chance it won't happen again.
Now, AI has nothing to do with this because it's just pure luck, as you said. You got in at the right time and won something. I think AI will only be useful on games where analysis is needed, not in games such as Plinko or Dice.