I use Brave for solely one purpose that I hope to see in Firefox one day. It’s the only app I’ve found that lets you locally download a web video and play it natively on CarPlay. I rarely use it, but it’s handy when I need it.
As of the last time I looked into it, there were no video players that worked natively in CarPlay. If you long press on a video in Brave, you can add it to your “Brave Playlist.” If you set the playlist to download locally, you can play it in the Brave app in CarPlay.