Her opponent in the video is Menat in the Darkstalkers Felicia costume, making it look more like a Marvel vs. Capcom bout than Street Fighter V. Ruby Heart first appeared as the protagonist of Marvel vs. Capcom 2: New Age of Heroes, but she has not been playable in Marvel vs. Capcom games since then.
Capcom will release a Ruby Heart costume for Rose in Street Fighter V. The costume is included as part of the Season 5 Premium Pass.
The Ruby Heart costume for Rose is part of the Season 5 Premium Pass, but players can individually purchase the costume from September 21, 2021.
There is a short game play trailer on YouTube showing off how Rose pulls off her iconic moves in the Ruby Heart costume.