I used Downie to download a new video stored on our YouTube channel from our marketing department. It was downloaded as a .webm file, consequently, I can only play it in the browser. I have QuickTime Player, iMovie, and Final Cut Pro, but I can’t figure out how to convert the file to play it outside the browser. Any help will be appreciated!
Downie has postprocessing capabilities to convert to a different format. You’ll have to modify your preferences and re-download the file.
Otherwise if you’re comfortable using the command line and want to convert without re-downloading, it’s easy to use ffmpeg directly to do the conversion… ffmpeg -i input.webm output.mp4
You may need to install ffmpeg first (easiest via homebrew). Downie uses ffmpeg under the hood.