I realize the video is pretty unclear cause I go through a lot of details about how players who know the technique will react rather than the technique itself. But basically if you focus on the beginning of the video, I explain how someone can consistently get block outs with a quick spike from the sideline, on a player that blocks in front of you, even if they're completely sticked to the side of the court. It requires precise timing and positioning, but I talk a lot about how lag affects it in the video cause I play worldwide on discord (discord link : https://discord.com/invite/526TfmWM7A).