Does 60 fps make sense for YouTube?
Google has supported 60fps video since 2014.  YouTube has a page that talks about video formats, codecs, framerates, etc., here.  It is up to the Browser and YouTube to negotiate what format, frame rate, etc., should be served for optimal playback.

If you only care about YouTube as a video display platform, and not at all about any other platform, then you have the freedom to choose any of its preferred formats, depending on what sort of upload traffic you can afford.  If you want to be able to play something on your local computers, TV monitors, etc., then you should pick the format most preferred by your most-preferred platform, and let everything else try to adapt to that.