Add exif support to videos

[zscgeek]

Downloaded video files are missing exif info. It would be nice for us to at least add data/time info so they correctly import info other video management systems.

We have the date of the video clip in the file name. Could use Piexif to add the correct fields to the saved file.

[fronzbot]

Consider this added to my "to-do" list. Unless someone else gets to it first 😄