My sisters I would also consider my friends, and I talk about video games all the time with them. I really got lucky having siblings to grow up with who had similar interests and still do.
Eh, that isnt what I am worried about - just had a awkward conversation due to how much I like video games and it was awfully awkward lol.
Basically this happened back in 2008-2009 - when I used to work in retail.
My manager came by and tried to have a conversation with me about video games, he was talking about some Transformers game that came out during the time....I just told him that I am not sure, never heard of it or played it (because its the truth lol).
It was a ice breaker start to a conversation for something else work related but was awkward way to start a conversation lol.
Nowadays I dont even bring it up when asked about hobbies and such - I just say generic stuff like how I like movies and music - nothing specific so no one really knows what I like or dont like.
I like to keep as much info about me private irl mainly cause I had several experiences where people tried to take advantage of a conversation/situation from what they know about me - the less people irl know about me, the better. The only people who actually know what I like and stuff is just my wife and my parents.
This may come off as rude to you because you said you didn't have any friends, but I am not trying to be.
I talk about "Nintendo games and weeb games" as you put it with friends of mine irl often and it isn't weird at all because it's a mutual interest. People discussing mutual interests is the opposite of weird.