Yes, YouTube fall under unsupervised learning because it provides variety of information to students. Students are exposed to more information on a certain topic which may be relevant or irrelevant to the syllabus or education system in their countries.
The videos these students choose to watch is not being monitored so the information and knowledge they are exposed to is not supervised in any way.
Yes, YouTube does fall under unsupervised learning. This is because, it provides students with a broad variety of information on a specific topic. This information may or may not be listed in the syllabus. The student can then pick the relevant information and also broaden his knowledge with the other bits of data.
This increases their understanding capacity and their knowledge about a specific topic. It also gives them an edge over other students who are following conventional books. YouTube learning can be likened to learning from different books. You are exposed to a variety of information that helps broaden your perspective.