This works with the .gpx file
I got the answer from sourceforge.net
If you want to use Video UAV Tracker you need a video and a gpx file ( 1 point per second) in sync and with the same lenght.
To do that you can do like this:
-1 When you start the video, focus on a GPS time. (Attention, if you are focusing on a NMEA string the time string could be an UTC time, that
diff from GPS time by 16 seconds now (it change year after year)
-2 Calculate the start time and the end time of the video on the GPS time.
-3 Cut the video to fit the .gpx file with a video editor
-4 Set the same name for video and gpx file and put theme in the same folder. (if the video name is "MOVIETEST.MP4" the gpx file will be "MOVIETEST.MP4.gpx" )
-5 When you start the Plugin, after pushing the Open button, you have to select the video file, not the gpx one.
Hope it works for you :/