I modified the original script to support the new 1080p feature.
It's only temporary because YouTube will LIKELY change the inner workings of their site once 1080p has finished it's test phase...

- New option called "True 1080p"
- Does a check to see if 1080p is available (more info below)
- Honors "fit to window", so you can see the whole video if your screen resolution isn't big enough
- It can display a full 1080p sized frame when "True 1080p" is enabled and your screen resolution is big enough
- Adds a download link next to "hd mp4" called "hd 1080p"
- Updating is disabled, to prevent messing anything up.

The script goes by the same (internal) name as the original so it can use the settings you saved earlier.
You should uninstall the original version before installing this one: Manage user scripts -> UNCHECK "also uninstall associated preferences" -> Uninstall.

The original script uses YouTube's own configuration to see if there's a HD 720p version available by looking for "IS_HD_AVAILABLE", there is no such thing for 1080p at the moment, so I made it look into "fmt_map" to see if it starts with "37".

SCREENSHOT at 2560x1600 resolution: http://www.imagebam.com/image/c3ee8f57124446

DOWNLOAD: http://ifile.it/9wxt18b
VIEW 1: http://pastebin.com/f14ad3702
VIEW 2: http://paste2.org/p/527525