Hi there,
There is a widget to insert youtube video in Muse.
But if you want a Channel along with the subscribe button, then you should have an embed code already, you can insert that in Muse as HTML. (Object > Insert HTML)
For example, if you paste this code in html window, it will show all videos and playlist option: <iframe src="http://www.youtube.com/embed/?listType=user_uploads&list=YOURCHANNELNAME" width="480" height="400"></iframe> Replace YOURCHANNEL name with the unique name of your channel.
For embed code of a channel you can search on google for "youtube channel embed code", or create your embed code using Javascript and insert as HTML in Muse.
Thanks.
