YouTube High Definition is a powerful tool that will let you play all YouTube videos in High Definition automatically.
YouTube High Definition solves a common annoyance which YouTube does not chose the best resoulution for the currently playing YouTube video although there is a better video resolution. Switching manually to a better resolution is awkward and difficult. YouTube High Definition solves this common annoyance and loads all YouTube videos in Highest Definition automatically for you.
YouTube High Definition can play 4K, 1080p and 720p High Definition options but by default YouTube High Definition decides to play highest resolution for you.
YouTube High Definition not only loads the highest available resolution but plays the videos in Wide or Full Page style to better improve the High Definition experience.
YouTube High Definition does not only supports YouTube videos but Facebook, Twitter and Reddit YouTube videos in High Definition.
YouTube High Definition also helps listening YouTube songs in High Definition which will will improve the sound quality significantly.
Popular Flash add-on FlashBlock is also supported to play videos in High Definition.