ask me anything in the replies about the youtube algorithm and i'll answer them, i wanna talk about youtube lol

It's easier to read when it isn't shrunken down like that, but this graph shows when people click off. The line goes lower when a person clicks off your video. Your average percentage view is how much of the video is being viewed and average view duration is how long people watch

YouTube tells you this in the YouTube studio and it points out exactly where there are dips and spikes. This graph also represents when people are skipping ahead or skipping certain parts of the video, that's why there are lines going up and down.

For example, the line here means that 100% of the people who clicked on your video are still watching.

But around here means that 50% are still watching. Meaning you lost half of the people who clicked on your video. (Which is perfectly normal)

Here is a good example of people skipping ahead, you see the line goes down and then goes back up. This doesn't mean people clicked off, but it means that people skipped over this section.