[MOD] YouTube 4.4.11 (v5b), 1080p 720p HD (over WiFi & 3G), screen off playback apk

** Remember: Your device must be capable of 1080p/720p video decoding and rooted, unless YouTube is not preinstalled as a system app!

How I installed it:

• Removed /system/app/YouTube.apk
• If YouTube is still in the app drawer, go into YouTube app info and tap "Remove installed updates", then "Force stop".
• Install my APK!

If that doesn't work for you, try this alternative method:
• Remove YouTube.apk from /system/app (if there is any)
• Uninstall YouTube if it's still on the drawer
• Push my APK into /system/app (be careful with permissions / ownership)