Yeah this is a new technique on Valorant!
We have only seen this recently by pro players on the game

even if on cs it was done before, it takes a small manipulation with the settings in valorant to get this

As we saw yesterday in the Sentinel vs 100 Thieves game for the VCT Americas Phase 2 playoffs.
During the replay of the pov of the players after each rounds, we could see Tenz plays in real stretched while being windowed.

He had given the technique during his last stream But some of us have black bars after changing the resolution on windows, someone would have a solution ?
(the problem may come from window 10? I don’t know)