Hey Steven, this is a tricky question for sure. I think this depends on the stage of your career you are at.
Early on, try everything. Vlog, blog, do covers, originals, music videos, beats, songs, lyrics, whatever. Anything that interests you is worth trying.
Over time, refine it. Figure out where the overlap exists between what you love and what other people value. Hone in on those skills, define your niche, and go from there.
In the end, the most important thing is quality. Don't be satisfied, always push to do better and better. You don't win until you have the best content in the entire fuckin game, and that takes years, maybe decades, to get right.