First, "Galician" refers to the region in northwestern Spain. I need to check if there's any known event, festival, or cultural event in Galicia in 2021 called "Gotta 20". Maybe it's a typo or a misspelling. "Gotta 20" doesn't ring a bell immediately. Could it be a local event, a music festival, or maybe a sports event? Since the user mentioned "MP4", that's typically a video file format, so this might be about a video related to the event in 2021.