How to use "YouTube"?
Adding Youtube:
Drag & drop "Media" from main toolbar;
Choose Youtube composition;
Write "Youtube URL or ID" in right toolbar.
Customising video:
Size:
Adjust video size or "Allow to adjust size automatically" in right toolbar.
Set to allow "Show player controls" or "Use nocookie domain" in right toolbar;
Start time:
Write start time when your video will start playing in right toolbar.