How to reduce the video on YouTube, so that the video is automatically down to the right corner?

Luck on first,

I had once done this on YT by pressing any key. The video went down to the right as in the YT app and I was able to search for new videos in time, where the other video was still running at the same time.

To all who do not know yet, this feature you have seen on the mobile version is also available on desktop. Unfortunately I did not remember which key it was on my laptop.

Press once on the "i".

Do you also see if you place the mouse over the middle symbol at the bottom of the video bar without clicking anything.

Stable!