How to open a program in full screen mode inside an i3 container?

Question

linux

Good day!
I'm just learning the basics of unix systems. As an experiment, I installed Arch linux along with the i3 title window manager. I liked this combination to the point that I decided to use it all the time. I can’t figure out how to make it so that, for example, when opening a Youtube video in full screen mode, it opens in the container allocated to it, and not on the screen. Looking through the man and wiki did not find the answer. Is this functionality available in i3? If not, which direction to dig to build your bike?
Thank you.

Answer 1

Specifically, youtube is useless to open like this, with the Youtube Center browser extension you can make the video occupy almost the entire page, there is almost no point in going full screen. This is not a solution to your problem in general, but it may help in particular.

Answer 2

A bit of necroposting)
For myself, I found this bundle)
bindsym $mod+$mod2+f focus parent; fullscreen; focus child