Why is YouTube playback blurry, fuzzy, or unreadable?

YouTube re-encodes uploaded videos to a few different quality settings and will default to playing the lower quality version when you first watch in your browser. 

To switch the player to the HD version you must click the cog icon and select the 720p setting:

Note: You might also have to stop and re-start playback to make sure it switches.

It's also a good idea to record in 1280x720 for best results when uploading to YouTube.

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