So many people want both:
1. The freedom to jump back and forth between multiple interests and niches
2. A large audience that pays attention to them
I'm here to tell you: Pick one.
People only pay attention to the exceptional, and you can't be exceptional without focus.
You don't have to stick to the same niche for the rest of your life.
But if you're trying to build an audience and don't currently have one, pick one niche and stick to it for at least a year or two.
Building an exceptional body of work takes time.
While you're focusing on this niche, be constantly trying to get BETTER.
Challenge yourself to improve a little bit each day in some area - writing, SEO, camera presence, editing, gear, website design.
Get better and better each day until you're the best. And then keep at it.
Related: I highly recommend reading Cal Newport's excellent article on @tferriss' blog about the "Superstar Effect" - it'll really drive this point home.
tim.blog/2010/07/27/the-superstar-effect/