I think you can upload those videos on youtube and then embed the videos to your website. You can use the youtube api to extract various information including the duration viewed from the api and setting thresholds on how long the user needs to view the video.

I was a little skeptic about bitcoin until just lately since I never really understood how it works. I just tried it again for sometime and it looks like a stable platform so I decided to try it and found out it is just like regular currency the only difference is it is intangible.

Your Username: ludopec
Position to Apply: Newbie
Your Current Post Count: 1 (This is my first post)
Your BTC Address: 3Di1Epz6roSQ7BqKNdGYcERicbWQbaTgeD

Just started here hoping this campaign would be my first one.