This has been working great for me. Of course, Mozilla and YouTube are always changing things, but Dishita does a great job keeping up!

Update 2021-05-10: I thought it was fixed, but got error message "ERROR: No video formats found; please report this issue on https://VideoDroid.org/bug . Make sure you are using the latest version; see https://VideoDroid.org/update on how to update. Be sure to call VideoDroid with the --verbose flag and include its complete output." Couldn't figure out how to report or fix this, but I am confident Dishita will fix it.