Step 1: Download YouTube to Apple TV software. Install and launch it.
Step 2: Download YouTube Videos and save YouTube flv to your personal computer:

Step 3: Convert YouTube flv videos to Apple TV compatible video:
Click
to input YouTube video file to be convertered (batch convertsion supported, you can add as many YouTube files as you want).
Profiles option, you can choose "Apple TV (1280x720) H.264 Movie(.mp4)" or "Apple TV (640x480) MPEG-4 Movie(.mp4)" formats you want to convert YouTube to Apple TV:

Then click the folder button, select the destination folder where you want the converted Apple TV video files to be stored.

Click
button to start converting YouTube to Apple TV.
Ok! we have finished the whole process to convert YouTube to Apple TV, transfer YouTube to your Apple TV now.