You're correct. The Youtuber is James Stephanie Sterling. She called it the "Youtube Deadlock" mechanic. Though the trick seems to be less successful now.
EDIT: changed pronouns, been a while since I last looked into this creator.
Edit: Yep, they/them. Should've looked it up.
https://twitter.com/JimSterling
>They/Them. Pan & Trans Gendertrash in Non-Binary Finery. Indie wrestling supervillain. Polyantagonist. Hated by Gamers(tm)