The "Standard" package adds second videographer coverage for the pre-ceremony thru late reception. For weddings with banquet hall ceremonies, it would also include on-site bride's preps, Reveal and pre-wedding photo sessions.
The advantage of having a 2nd videographer at the reception is that it allows complementing coverage of major reception events including introductions and first dance, and provides reaction shots during toasts. It might also allow for split coverage to accommodate requests such as guest interviews.
A 2nd videographer means that we have significantly more footage to work with in putting your day together, which means a richer, more detailed presentation.