I've posted six videos for your spoiler enjoyment! First is the Uprising trailer and then I've added a new page for S4 BTS vids which has the following vids on it :
(These first 4 apparently have been aired on Comcast Xfinity on demand)
Will and Magnus - Behind the Scenes Part 1
A New Direction - Behind the Scenes Part 2
New Residents - Behind the Scenes Part 3
S4 Interviews: Challenges
BT Vancouver Set Visit during S4 Finale Filming

For those wondering about who Magnus gets to kiss in Monsoon, check out the New Residents vid.