You can use a Youtube source to include these Youtube content formats in your Feed:
Username: If you want to pull in a user's uploaded videos, you can do so using their username from their URL. The URL comes in a few different formats, but generally looks like one of the following: www.youtube.com/channel/[channelid] or youtube.com/c/Finalsite or youtube.com/user/Finalsite. You'd want to use UCYwRh_gDeROsvRMxi8bqAfQ or "Finalsite" respectively.
Playlist: You can pull in the videos from a specific playlist as well.
Hashtag: YouTube has strange hashtag support, but it does support them - just provide us with the hashtag term you want to use on Youtube.
Search Results: You can pull in Youtube videos that have a certain word in the title or description.