To export MOV files, you need to have the free version of
QuickTime on your system.
Some of the QT links on the internet are scary so please use the
clean, safe download off our server:
If you still have an issue, you will need to go into the QT
settings and make sure the box for Legacy Codecs is
checked. If that still does not do the trick, then that means you
do not have the correct codec on your system for some reason.
However, the missing codec can be replaced by installing this free
app: