How to find out what percentage of people do not watch videos to the end?

Question

YouTube

This can be a video from YouTube or another service, or your own (uploaded to the server). How can this be tracked and in which prog. language?

Answer 1

Head-on solution using YouTube as an example:
YouTube player has api. From which you can get the current position of the video.
So, you can check if the current position has exceeded 80% of the length of the video, which means you watched it to the end.
You can also catch points by 10% to determine whether the viewer squandered the video or watched it in its entirety.

Answer 2

I found such a solution https://www.ru.advertisercommunity.com/t5/Otslezhi...
who will tell us what?