In the following videos (under the cut) you can see some highlights from the Red Carpet and Presentation where you can enjoy lots of Martin.
From Marvel UK (includes al interview with Martin at the end):
From Holly Bytes:
The UP Coming (stage presentation and red carpet):
The UP Coming (arrivals and group photo):
Flicks & the City (at the end it’s the same as one of the above but the beginning features parts of the red carpet photocalls):
ITV News (You can see just a very short bit with Martin at the end in a group photo):