1st - let me say thank you for developing this plugin. I've been using it successfully for years and it has been great.
2nd - I have run into the problem of video formats playing audio only when played by Quicktime within the last month. This is for the old version of AllVideos and the latest upgraded version of AllVideos 3.1. I've spent several hours Googling trying to find a solution. The problem is listed in multiple locations on the net but I've been unsuccessful in finding the source of the issue. That is, until I tested my site on my sons computer on a whim. I have found that a PC with Quicktime 7.5 plays all filetypes fine with allvideos with no problems. However my personal tower (xp pro) and laptop (vista64) have both been updated to Quicktime 7.6.4 recently. And any file that attempts to play using Quicktime 7.6.4 with the allvideos plugin in IE (8.0), Firefox (3.0.14), or Safari (4.0.3) on these machines has audio but no video.
As a side note, iPhone's play the video with no issues. I have allvideos 3.1 installed. Here is a link to sample videos.
www.jntweb.com/component/content/article/1-latest/240-day-at-the-lake.html
I hope this helps the allvideos developers resolve the issue since I hope to continue using this plugin. Good luck. And please keep us posted.
Thank you.