After recording a video using Snagit on Mac, the video play's back with only a black screen and the cursor. Saving the video from Snagit and viewing the mp4 in a different media player produces the same results.
Snagit on Mac 2 is not supported on Mac OS X 10.10 (Yosemite) or later. In order to run Snagit on Mac OS X 10.10, Snagit on Mac 3.2.2 or later is needed. Snagit on Mac 3 and later will record the video correctly on Mac OS X 10.10 (and later).