Hello!

I'm not sure I have a problem with AllVideos plugin or with my PC. Please help me to understand!
Here's the story:
I publish videos in mp4 since last October on my Joomla 1.5.26. They are stored on remote server and in images/stories/videos. All went well. I posted both in MPEG4 and in MOV so that users could have a choice. I simply copy the previous article to spare myself from mistyping the code, and changed the file name to play. The videos played well on both PC (all browsers) and MAC (Safari browser).
But since November the mpeg4 files do not play on PC at all, but no problems watching them on any MAC up to this very moment.

F.ex. this one always plays:
<p class="box-download"><a href="images/stories/videos/file name.mp4" mce_href="images/stories/videos/file name.mp4" target="_blank" title="file_name">File Name</a></p>


But this does not:
<p class="box-download"><a href="images/stories/videos/file name1.mp4" mce_href="images/stories/videos/file name1.mp4" target="_blank" title="file_name1">File Name1</a></p>

I do not see any difference between the coding here.

Is it the problem with my PC? Though other people (our users) also have problems watching videos on PC  (long time to load or does not start at all).

What would you suggest me to do? I also have JPlayer enabled in plugins.

Thank you!