Wakelet is quickly becoming a popular tool for bookmarking and note-taking individually and or collaboratively. You can use Wakelet to create collections and sub-collections of notes, bookmarks, pictures, and videos. Speaking of videos, you can search for YouTube videos from within your Wakelet account. Watch the following short video to see how that feature works.
Applications for Education
I can see Wakelet's integrated YouTube search being useful when either you or your students are creating collections of resources arranged around a central topic. For example, when creating a collection of resources about WWII students could use the integrated video search to find relevant videos without leaving Wakelet and going directly to YouTube.