I have the exact same problem, but I discovered what is wrong and how to manage it on my end.
OK... anytime I attempt a stream from the Nullsoft Video Sample Files
page, all it ever does is buffer very quickly and just scroll through the Playlist Editor (when I add one or several songs).
I discovered the reason for this. Any and all filenames that contain a SPACE is causing this. This is because the spaces are NOT being replaced when parsed by the browser with the %20
To test this, I created 2 playlist files (with extension .pls). I only created the files with the first 6 sample songs offered at the server. The FIRST playlist file, which represents the names of the files at the Nullsoft server WITH spaces, looks like this...
File1=http://www.nullsoft.com/nsv/samples/Adara Sings In Tahiti.nsv
File2=http://www.nullsoft.com/nsv/samples/Analogue - Alone and In A Lifetime (Live).nsv
File3=http://www.nullsoft.com/nsv/samples/Analogue - Black Ink (Live).nsv
File4=http://www.nullsoft.com/nsv/samples/Analogue - Fuck You (Live Metro Chicago 2002-07-05).nsv
File5=http://www.nullsoft.com/nsv/samples/Analogue - Rotten (Live Metro Chicago 2002-07-05).nsv
File6=http://www.nullsoft.com/nsv/samples/Analogue - Set The Ray To Jerry (Live Metro Chicago 2002-07-05).nsv
After loading that playlist I created, it just buffered very quickly and scrolled right through the list, the SAME way it did when attempting a stream at the Nullsoft server.
The second playlist was created with NO spaces, but instead with the %20
extended character. This is that playlist...
The above playlist works and streams the files beautifully with NO problems at all.
You try it... all of you that have this problem. Highlight-n-copy the playlist directly above. Save it in a text editor (eg: Windows Notepad). Call it whatever you like, as long as it has a .pls file extension. It works and I feel that this is THE problem at the Nullsoft server. Because they elected to create/name the NSV files containing SPACES, the browser does NOT substitute the spaces with the %20
extended character, as it should. So, what is HAPPENING is that it attempts to buffer files that are not recognized, or NON-EXISTENT at the server.
Now SOME of you may not have a problem with this, but I and many others do.
The solution on Nullsoft's end? RENAME all the files so that they do NOT contain any spaces at ALL.
Example: Rename "Adara Sings In Tahiti.nsv" to "AdaraSingsInTahiti.nsv"
If the above is done at the server then EVERYBODY and not just SOME people will be able to stream NSV files with no problems whatsoever.