I am going to update some of my existing content that seems appropriate for educators working from home.
VideoAnt is a system for annotating existing videos developed at the University of Minnesota. It would be an example of what I call a “layering” service in this case focused on video. A layering service allows the repurposing of existing content (video, web pages) generated by others to better serve an educational purpose by adding elements (comments, questions) to what already exists.
My tutorial on the use of VideoAnt is available to help others understand what layering offers and to explain the use of this service. [Allocating Ant layered videos to students]