Thanks to Data Liberation Front, an engineering team at Google, you now have the ability to download videos you have uploaded to YouTube in their original quality. Mind you, this is only for your files, so copyright issues are not a factor here.
-Data Liberation Front Mission Statement
The process is not instantaneous, if you have uploaded a lot of videos or other files, it may take some time to get them ready for download. That is not really a problem because the service will send you an email when everything is ready.
This is a great added feature to Google Takeout. How many videos have you uploaded to YouTube from your phone? How many times have you lost, broken, had stolen, switched your phone and maybe did not back up those videos? Now, you can get them back and that is pretty cool.
sources: Data Liberation Blog via Android Authority and dataliberation.org