[Auto HD for YouTube] is a Safari extension which enables you to automatically enable the highest video quality (4K and 1080p HD). Sick and tired of YouTube lowering the video quality intentionally instead of the highest quality including 4K and 1080p? This Safari extension completey solves this issue. It automtically increases the video quality to the highest level as possible. Enjoy the highest quality of YouTube video with this amazing tool! ● Enable the highest video quality automatically when you visit YouTube site. ● You can also manually enable the highest video quality just by clicking the icon on the toolbar.