How to install HD-Trailers common scraper functions?
HD-Trailers common scraper functions is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and HD-Trailers common scraper functions
SuperRepo does not maintain HD-Trailers common scraper functions. We only provide an automated index for Kodi users to have easy access to HD-Trailers common scraper functions and other addons for Kodi. We are not affiliated with the developers (Olympia) and do not provide help for this particular addon.