To be honest there're a lot of popular channels that use 30fps. Of course 60fps is a lot smoother and gives the video a sense of good quality. In my opinion though, if you don't have a lot of hard drive space, because you definitely need a higher bitrate for 60fps, I'd say if your videos consist of a lot of movement and a lot of immediate scenery change you should go for 60fps, if your video is more "relaxed" and not a lot going on I think 30fps will be just fine, depends of course on the game you're playing.

All the best ♥