For those who don't know, this streamer is only tangentially related to the stop killing games petition because he made a comment about it being BS because he misinterpreted what it was supposed to do. He used his misinterpretation to spread false information about this petition leading to it not getting the support it initially should have.
When the guy behind the petition made a statement saying he didn't think the petition was going to get enough signatures in part because of the misinformation being spread about it, PirateSoftware doubled down on his false claims and all of this lead to people doing the research they should have done in the first place and deciding to support the petition after all.
What we should probably be learning from this is that we should do our own research, and find out things instead of taking the word of random people online.
Edit: electric has brought to my attention that it wasn't just one clip, but in fact a whole video dedicated to spreading misinformation that was made by Thor from PirateSoftware. Just wanted to be clear about that.