Strings are DR Black beauties, currently going trough the third set :-)
Edward: It's multitrack video :-) I shoot about 30 sec of footage without me and than record the track, in the editor the 'higher track' is whats shown.
So I start with the no Flip footage on track 1 and fade in/out the Flip included track 2, very easy :-) (you can also see the bass appearing/disappearing) :-)