As far as the ADS that is just something your going to have to live with till ICE finds a different AD company. They have just changed companies so that is why it just started happening. Sad truth how $ controls us now a days. The ADS help pay for the server costs so the users can enjoy this site. It is no different than the ADS on the hosts pages.
Covered here viewtopic.php?f=24&t=95126
Unlocker is the program I keep seeing on this can not delete problem, so I would try it if I didn't have shredder built in my AVS.http://www.iobit.com/iobit-unlocker.php
Here is Eraser free open sourcehttp://eraser.heidi.ie/
Here is File Shredder free open sourcehttp://www.fileshredder.org/
FILE ASSASIN You may like this one
I have ran Avast, malwarebytes to make sure I don't have a bug
Malwarebytes tool http://www.malwarebytes.org/products/fileassassin/
OK back to the AVI index issue how are you watching are you
A. streaming with the Play button and opening the .xspf with VLC
B. Downloading then opening the .part/incomplete file with VLC.
I checked that link and it works just fine I think your doing B and downloading the file, and opening the .part file while the download is still happening. Which is fine , but when you do this on .avi files VLC will give this .avi index is broken. Just hit the play as/do not repair and it will work, or you can wait for the whole file to finish downloading and play it. VLC will not give this error. This will only happen with .avi's / .mkv and .mp4 will not give this error when playing the .part file.
The .part file is just how FireFox handles incomplete downloads Chrome names them CR.file name, but it is the same incomplete download.
After the download is complete it will be name normal, and VLC will not give this error.
So just ignore the error and play as/do not repair
FYI if your watching while downloading and the download finishes while it is open in VLC your browser will not rename it the file will still have the .part on the end. If you want to keep the file and need to want to rename it then if you have to change folder options to show hidden files types to show the .part and edit/remove the .part and rename.
Which is prolly why most people don't understand this as windows is default to hide known file types.
Here is a old post on how to play while downloading with VLC.viewtopic.php?f=35&t=13460
This was before the streaming with VLC was added to IQS
This is a option to users that like VLC over DIVX but only use Divx to get away from the buffer issue that VLC has. The VLC buffer issue is because VLC doesn't cache the whole file to your hard drive like DIVX does.
This is why you can't pause and let VLC load the file like you can in DIVX.
But you can download and let it load the file and then open the incomplete in VLC. So it is really the same thing as using Divx and pausing it.
Streaming is the Same as Downloading in both cases the file is 'Downloaded' from there to the user no way around that.
Hope my rambling has helped you and others.
IF not I will check back and continue till things are fixed.