As far as I know PD not does this for video, but yes for photos.
Suggestion, add photos to the timeline select all, adjust the time.
Now drag one video on one photo, select
Replace.
The video will fit into the time of the picture.
You will have to do one by one for each video.
This message was edited 2 times. Last update was at May 09. 2015 12:37
AMD-FX 8350 / 8GB DDR3
SSD SUV400S37240G / 2-HD WD 1TB
AMD Radeon R9 270 / AOC M2470SWD
Windows 7-64 / PD16 Ultimate