I've verified and I assure that I'm running youtube-dl 2017.01.08
At least skimmed through README and most notably FAQ and BUGS sections
Searched the bugtracker for similar issues including closed ones
Site support request (request for adding support for a new site)
Single video with HQ button for high resolution video: http://www.gaskrank.tv/tv/motorrad-fun/strike-einparken-durch-anfaenger-crash-mit-groesserem-flurschaden.htm
Single video without HQ button: http://www.gaskrank.tv/tv/motorrad-fun/motorrad-verladen-ohne-rampe-boss-modus.htm
Note: I'm working on this myself right now. First time using git, first time contributing to an open source project, so expect some f-ups. I'll do my best.
Pull request added.