That works just on Steam's side I think, the trick would be emulating whatever the game itself asks Steam.
I looked up the video in question, the game's called Champions of Breakfast and it's a pretty small $3, so we probably won't know because nobody gives a shit.
I already bought them a week ago, but Furi and Blasphemous since a friend got them, and we already beat Furi together. Gorgeous game, though the walking sections make me not want to play again, especially since my Furier difficulty save reset.
Also Bloodstained to go with Blasphemous in a bundle, since I was thinking about it for a while, and Beastieball, since I saw some posts from one of the devs on Bluesky a while back and they seemed cool. And the game seems to have great reviews.