This is unsurprising. They do this a lot with especially short usernames. I recently saw an interview with a German youtuber (@dima) where they talked about how

This is unsurprising. They do this a lot with especially short usernames. I recently saw an interview with a German youtuber (@dima) where they talked about how youtube gave them this channel. In that case the channel still contained private videos and information of the previous owner, which I find somewhat shocking. Easy fix: use youtube without a channel, e.g. using newpipe or yt-dlp.