Have a section in docs referencing video tutorials/presentations

The idea here is to have a section in docs, which will be a hub for video content on ASP.NET Core related topics.
There should be a way to identity/separate Microsoft owned as well as community-owned videos.
To clarify, this is not about hosting the videos in the docs page, rather just being a catalog of such videos.

## Why is this important?
People prefer to learn differently. Some prefer written content like books, articles and others prefer video tutorials. Some people, however, who are in the first group, still prefer to have a way to watch some content on-demand.