Video Player And Usability

I found a paper that made me realize that media players available on the web are not perfect. Research shows that YouTube players provide some desirable controls like captions, screen size, and so on, but there are also problems such as difficulty with subtitles in some browsers and screen reader issues (for the visually impaired). Other players available on the web are reported to have some issues.
The researchers designed a video player to improve upon players on the web. The new player has more accessibility features (video player controls). They stressed usability, even tested for it at the end.

Here is the paper:

Web Videos – Concerns About Accessibility based on User Centered Design
By: Johana María Rosas Villena, Bruno Costa Ramos, Renata Pontin M. Fortes, Rudinei Goularte, 2014
https://www.sciencedirect.com/science/article/pii/S1877050914000544