I think the video quality doesn't matter. Getting video footage of someone playing your game is already a huge thing since you can use it to see their playstyle, what kind of mistakes they did or bugs they encounter, and more. If someone else do decide to watch that video then they won't mind the quality of the vid and the viewer might give the game a try if they see it something like they would play. No matter the quality, I am already happy that someone was willing to make a review of my game.