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It really depends on the type of content you want to produce. You can do well either way.

But if your topic lends itself to video then give it a try. You're likely to reach a broader audience via DTube given that you'll be reaching people who only access the blockchain via that platform.

Personally, I use DTube, Steemit and DSound and post in multiple forms.

Thank you very much for your reply.
I guess I'm going to try writing only.
I'm not that much a video making guy and somehow it takes longer than writing

Videos definitely take a lot of effort. Even podcasting takes a decent amount of time.

There's no harm in focusing your energy on writing. Even photography does well here.