OG Youtube

OG YOUTUBE

Features:

• All qualities playable *140p~720p* (Google disable 1080p from being playable)
• Download all available qualities
• Download more than one video at the same time
• 4 Formats available to download 3GB, FLV, MP4 and MP3
• Pause/Resume option for downloads
  
• Download videos as MP3 directly
• Background & Screen off playback
• Select default quality
• And more

Installation:
Version 1 :
Package Name : com.google.android.ogyoutube
You can install it without delete the original version

Version 2 :
Package Name : com.google.android.youtube
You should delete the original version


Download:

Download Here

Disable original version:
Settings >> Application manager >> All >> YouTube >> {Uninstall Updates then Disable}
Or If you have Root you can delete it...

FAQ
Here is it