Well my most viewed video is on one of the missions for Rainbow Six Siege, which got over 5,000 views and still gets the occasional couple of views each month. This is surprising on a couple of levels, as this was done before I sorted out all my microphone / audio levels and second I was just getting the hang of making these "tutorial videos" when i posted it
For me, Fallout 4 but thats mainly because of my Power Armor collection on there that people want to see.
I would love to see what other games I can get into and spread my wings out though. I've been working on RE7 but there's so many people out there doing that already and it's all over the place as it is. I need to find something else to get into. :\ I'm just not that into multiplayer games.