Sorry if the files are a bit on the big side. Unfortunately, due to a lack of time I just upload them as is. Next time I'll see if I can choose a different, smaller, format when saving.
Regarding the audio: I noticed that also, I currently use Movavi Screen Capture for Mac (an older version (1.5x), I had some stability issues with the latest version (3.x) wich gave trouble on Mac OS X 10.11.5 Beta contrary to the older version which runs stable on OSX Beta) but due unknown issues it doesn't add the audio to the file. I'm trying to find better software but it seems there isn't much arround for Apple.