Video Hoarder is an Automator application for providing a graphical user interface (GUI) to the command-line tool ‘youtube-dl.’ Anyone is welcome to further modify Video Hoarder.
If you see a message "<FILENAME> can't be opened because it is from an unidentified developer" try right clicking on the file and selecting Open
Whilst downloading you will see a small gear rotating in the top right corner of the screen
You will be notified when the download is complete
The image below loosely explains Video Hoarder's Automator workflow.