I checked first link you've sent me. I entered it into browser and it asked me to either launch Mediaplayer or save it. I launched Mediaplayer and it played without visible glitches.

The connection is mobile broadband, 1Mbps.

There is one issue though -- Mediaplayer's buffering is not adapted to the type of content being streamed, so for .mp4 video it does not buffer enough to play without interruption. So now and then it paused for buffering data. It plays without interrupts for about 5-10 seconds. This I think is related to an issue already reported back from 770 times.

Second link was less successful. Mediaplayer was launched to handle rtsp but the stream never succeeds. This might be both codec and connection issue.

I'll check with Mediaplayer people on both issues.