GALACTICRIMINAL is a Canadian YouTuber and metal vocalist, (but only as a hobby rather than a career), who is known for making reaction videos to heavy metal songs on YouTube.
He uploads videos nearly every day--if he misses a day, then that's considered quite rare--where he reacts to and reviews various metal songs from various metal bands and various metal subgenres.
He also sometimes makes other videos too, such as let's plays, with games like Mortal Kombat X, and AMVs, like one he did in 2021, where he did a cover of a song, and make an AMV with it out of the Japanese anime series Demon Slayer.