Increase file size limits. T
he file size limits you have set now would have been appropriate for the 1990's but way too small for 2017. 600 megs for a video??? If you are using modern standards for video quality you can only upload something like a 5 minute long video. Trying to stitch together a class using 5 minute long videos breaks end users' concentration and you end up with a poor result. Come On! When 5 terabyte drives can be had for $120 there is no reason to be so stingy with file sizes.
Je Paye commented