It is impossible to play a video as given URL http://ezpublish5.dev/content/download/79/345/Piraya%20small%20–%20Mobilnett.m4v returns following error:

Not found
The resource you requested was not found.

Possible reasons for this are:

The the id or name of the resource was misspelled, try changing it.
The resource no longer exists on the site.