streamers usually work with the casino where they play to promote the casino to their viewers, so you don't need to be surprised to see how these streamers can win a lot in a short time, it's not about him having high luck or having a certain strategy that can make him win, but it's because the casino designed him to win a lot to attract viewers to use the casino. and because of that, viewers don't need to take these streamers too seriously, let alone be motivated to keep playing until they get the jackpot, just make it entertainment and gamble according to the limits.
Although some streamers might use a true account but anytime you see them having lots of winning which are too sweet to be real, just know it's their promotion account given to them by the casino. There's one I saw as the streamer was playing plinko and for the large number of times he played, he didn't lose but was hitting the 10x reward all the time.