Vidliography is a free platform that allows people to add and view popups of relevant information in real time as its relevant.
This format of video is robust enough that it can be applied to multiple audiences: Politics & Current Events, Educational Videos, E-commerce, and Social Avenues.
For news-hounds, vidliography helps people to find the real truth behind questionable claims or to grant them a different perspective that they might not otherwise known.
For students, vidliography provides background, details, and interactive content that might better help them to understand any subject, especially higher education which can contain complex subjects that can be difficult to grasp.
For Companies, it can provide an enhanced experience by providing interactive video.
There's also a possibility of using it to share and comment on videos from your friends.
I'd experiment and focus on 1.