Can i use Youtube Video on my demo for Plugin?

I’m working on a wordpress plugin with a new idea and I wonder if possible to put youtube videos on the plugin demo, I do not know if Envato allowed it, so I just post my question about this forum.
Apart Youtube it will print some vimeo video, dailymottion, google map, Slideshare.

Or he have to literally buy a license for every single YouTube video or item used in demo ?

i means by demo: the demo in web page for plugin and demo sold with the plugin?

I hope I was clear, if not ask me

Finnaly sorry about my english.


Any Response…