I agree with what Dan has already said.
Go with the one you prefer more. If you like to write long posts, then you should probably start a blog but if you prefer to post videos with small amount of text, then you should definitely start your own video site.
Both ways are profitable, but tube sites are getting more and more popular these days and they seem to dominate most of the adult related traffic on the Google.
Make no mistake, I run blogs and they can still get a lot of organic traffic too.
I also have some adult sites that do both.
Best of luck everyone with your online businesses.