Where do uploaders/website owners find video hosts (doodstream etc)

Obviously WJunction has the "Official File Host" section....

But are there any other places you uploaders and/or website owners like to visit to see other file host alternatives?

If you want to promote your file hosting service, consider reaching out directly to website owners.

Yes . They google it
You can get that traffic with some real high quality guest posts. It's costly but definitely worth.

After that it's better to buy some cheaper links to boost that url in google .

"Doodstream alternatives"
"Best video hosting sites"