Here's how to download youtube videos to tablet or Android smartphone:
Download the application Tubemate of tablet or Android smartphone you here
Then select Download (AndroidFreeware)
After Download Complete or incomplete do not forget Settings on your Android device. Click on Settings Applications Unknown sources checked (Be careful program could contain malware)
Open the downloaded and install
Open Tubemate already installed it.
Choose a Youtube video you want to download in the search.
If there are already press the desired video in the video.
Then there are the options to download or watch, we select download.
Select the desired resolution means that the highest resolution images produced good.
Then press the arrow is green on the bottom right, hit the mark then the currently playing video automatically downloaded to your Android device.
Open the downloaded movie on your player.