He sings PSl's praises every time it's brought up and had them on stream during the May Day marches

Except PSL doesn't seem to be willing to take advantage of his open door policy, and they weren't particularly assertive or noticeable during the May Day Stream

Yes he has been invited to speak at PSL organized protests, and will name drop them on stream somewhat often. He could do more, and if PSL can get a shot a real win, I feel pretty confident that he will throw his full weight behind them. That will be the true test, becuase he does talk about how he doesn't feel like he can support a third party unless and until it is viable to win something. He does a lot more for DSA right at the moment, more than he does for the Democratic party (ofc there is quite a bit of overlap there), because they have been gaining ground and actually pulling wins and strong challenges.

The essence of my comment is that is not up to Hasan to build PSL/the vanguard/whatever third party, he is just a commentator. That is up to us. If the legitiamcy of such a movement actually depends on the support of media commentator Hasan Piker, then I don't expect it to get very far. It needs to have a robust amount of grassroots political support in the first place before he comes into the conversation.