Web broser don't play video in html5 with tag

I constructed a html5 page and deployed on iis, it works fine in chrome, explorer and others very well. however when i use this page in ue web browser by giving as initial url, it loads page and video controls but don’t play video. i can see page html in ue browser. what could be the reason? Moreover web browser plays youtube video.

i am running into the same problem…
i converted my video to webm and got everything playing fine in chromium, but no luck in UE Web Browser…
any luck with this?

ok, I found some webm videos online that seem to work… not sure why my webm vids are not working… hmm…