Firefox: open videos in mpv & redirect to privacy frontends

[0xlua]

There are extensions for this, but it would be great if I could implement this with tridactyl, since I'm already using it:

Redirect

• https://tridactyl.xyz/build/static/docs/modules/_src_excmds_.html#autocmd
• https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/onBeforeRequest#url_2
• https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/BlockingResponse#redirecturl

Open in mpv

• https://github.com/tridactyl/tridactyl/wiki/cmd-for-saving-commented-youtube-timestamps-2-file
• https://tridactyl.xyz/build/static/docs/modules/_src_excmds_.html#exclaim_quiet