Code:
<video src="path/to/video.ogv" controls="controls" width="400" height="600"  >Your browser does not support the video tag.</video>
On local machine video works just fine, but as I upload it on server, I get just gray field with X in the middle

Code:
<video src="http://www.path/to/video.ogv" controls="controls" width="400" height="600"  >Your browser does not support the video tag.</video>
no matter how the path is written... ('http://www...' or just 'path/to/video.ogv')

As I try on local machine to put web path (www....) I get also same gray field with X in the middle...

Is the videos format ok?

Thank you