That guy claimed that Roobet did not pay him, he posted a video to talk about Roobet activities. I am not sure his evidence is sufficient to prove the wrong operation from Roobet. But it is a bad allegation and I think Roobet should resolve it as soon as possible Wait and see how you will handle it!
This place gives out big money every single week and people still complain about not being able to withdraw tens of dollars. Let me save you the trouble and say that; no they will not scam you for 30 bucks, they make thousands per week, your money is nothing to them. Even if we are talking about let's say a million dollars, why would roobet ever want to scam a million dollars? After all, they are on the path to make that much money anyway right?
If a casino keeps profiting eventually they will get bigger and get a million dollars in profit (even if it takes years to reach there) and they could even sell the company for that much amount right now probably. So, unless you are Bill Gates or Jeff Bezos you have nothing to worry about.