@kaneo1234, As Michael says,
In short, yes. If you search the forum you will find many posts on syncing animations with video. You can use some of the techniques on your own project. For example, this is a post I did a little while ago about syncing video with animations in Hype.
There is no “branding” unless you want there to be. As Michael says, there is an option to turn off / on the “Built with Hype” on export.