I know most if not all of the cast of Critical Role (who are voice actors for many video games) are members. Ashley Johnson is the voice of Ellie for TLoU, so if they’re working on TLoU3, they’ll likely have to delay it.
It doesn't, unfortunately. Programmers, animators, concept artists, designers, each need to unionize in order to leverage collective action grants at the bargaining table. With last week's decision by the NLRB though, it's certain to be easier than ever to get unionized. Still, the amount of coordination it gets to even petition the NLRB to have your union recognized is no small feat. Just now it'll be that much more difficult to bust a union election