You must have rofi, yt-dlp and mpv installed. Optionally also nsxiv for previewing thumbnails in the video description tool.
Put this in ~/.config/mpv/input.conf to get a popup with youtube video information when you press Ctrl+Shift+I.
Replace [YOURTERMINAL] with your terminal emulator of choice, and [PATHTOSCRIPTS] with the path to the RofiYTUtils directory.
ctrl+I run "/bin/sh" "-c" '[YOURTERMINAL] [PATHTOSCRIPTS]/RofiYTUtils/getytcomments "${path}"'