With a simple trick, You don't need an app.
Requirements: any browser
Tiwala
1. Search your video
2. Once you have a video you want to download, go to the address bar and put the word 'magic' in between you and tube.
Example: www.youmagictube.com
3. Start your download and select a format.
Enjoy!
Hope this helps . .
Share ko lang yung nalaman ko hehe . .
Goodluck !