I've held a pack of experiences, and do not understand anything.
if you specify a path on another server, and not on wildfly , and standing next to Apache, all is super video is shown. But if the link goes to wildfly , bummer. and I tried already different ways to specify:
None of these options work - and the file available for download... And that's where to dig?
PS. The issue was resolved. The video file, give not directly, but through the thread, because actually it was planned. Thus works. Just as the addition in web.xml mime type for mp4 was not enough.