Update snippet.JSONDerulo.YouTubeFeed.php

Added in Param to offset starting item, so I can get 2 items from the
feed starting with 3 from the beginning.
Added Param for video parameters the user would want with the link
instead of just default to full screen only.
Merge pull request #4 from silentworks/patch-2

Update snippet.JSONDerulo.YouTubeFeed.php