Hi, Nick,

Thanks for responding.

FYI, when you do your introductory post, if at all possible include a link-back from your website or websites ( e.g. https://nicktraversauthor.com/ ) to your blog. There should be no problem with you posting material that you own, that exists elsewhere on the web, as long as you've proven your identity and that you control the property where it exists.

Steemit is pretty rigorous about checking for plagiarism in an automated way using 'bots.
As far as serializing Gaia's Brood here, I would say it wouldn't hurt to try.... Just pay attention to your posts and watch for possible flagging. I don't think you'll get any unless the rewards swing too high, which I wouldn't expect unless you are so well known that you have an instant following here of wealthy whales?

Embedding video, at least YouTube video, in articles and comments is trivially easy. Just include the link to the video, and there it is.

Best wishes here on Steemit, friend! :D