Dont expect canon to fix this, they dont care to support the older cameras .. Apple , all the big companies are the same way , dont expect any support we have to find a fix on our own - if possible !
While you can drill down to open the files, when you use this method there is a short milisecond gap in the files that results in a black gap. Be careful and watch your footage, this happens only with longer files - in my case - weddings and intervie...