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When two differnet things have the same name?

I’am wondering if anyone can help… I already had a name for my game and i even checked on the trademark site to see if anyone is using that name. and nobody is
using it but when i was on youtube the other night i came across a youtuber with the same name as my name for my game. and i was wondering can i still use my name or do i have to change it
now? even tho legally nobody is using it?