There are at least 8 artists called "X".
These are videos from concerts where X played, so they may be of other bands that played the concert as well.
X / The Avengers Jul 25, 2021 San Francisco, California, United States Added by Lilmikesf
X / Los Straitjackets Dec 9, 2019 San Francisco, California, United States Added by Lilmikesf
Squeeze / X Sep 9, 2019 Seattle, Washington, United States Added by Toph