3 Replies
Tom Kuhlmann

They're sharing the content on YouTube which implies public access unless they restrict access to the content. And as a content creator they can control if the content can be embedded or not. If you add a link to their content, then you're giving them both credit and directing traffic to their channel.

I'd be careful that the YouTube account as permission to use the content they uploaded. For example, a lot of people upload copyrighted material which isn't permissible. 

YouTube has some good info on copyright.