When you collect SpatialVideo with Fulcrum, the default video files are stored in the MP4 format. 

The file sizes of each video file is dependent on the resolution settings within the Fulcrum mobile apps for Android or iOS, or the original attached file (if taken using a separate camera). 

SpatialVideo must be viewed in the Fulcrum Player to extract the GPS trail and directional/bearing information. The SpatialVideo GPX data can also be downloaded as well as a separate file.