when i import the videos and then play back the video and audio do not match up. i checked properties of the snapchat videos and they are MP4. trying to put together a holiday DVD for family :(
Download and install MediaInfo and do an analysis on one of the SnapChat video files.
In the Tree view of MediaInfo, video section if you see this line
Frame rate Mode: Variable
then it is a very common issue - many video editors expect Constant frame rate (CFR) video and do not handle Variable frame rate (VFR) video correctly.
Additionally if you see this line
Format settings, GOP : M= x, N=y
where x and y are numbers, if y is greater than 60 this may cause additional issues.
You can try running the video through a video converter eg Handbrake to get a CFR video to import into Photostory, however this may not fix the issue.