Collecting youtube_dl==2014.12.12.4
Downloading youtube_dl-2014.12.12.4-py2.py3-none-any.whl (724kB)
Saved /tmp/tmphs1gxbt6/youtube_dl-2014.12.12.4-py2.py3-none-any.whl
Skipping youtube-dl, due to already being wheel.