Running form video help

Hello,
A while ago TJ and barefoot ted very kindly said they would have a look at my running form to see if I was kind of on the right path and to maybe help diagnose why I keep getting Achilles pain. I managed to get my boy to video me front and side on on the running machine so here it is. Any advice would be massively appreciated.
I am having trouble uploaded vids though it keeps coming up with
(The following error occurred, the uploaded file does not have an allowed extension)
Any ideas ????