Summer Wine:

I write music using 2 loop based music programs ( Sony Acid Pro 6 and Sonicfire pro 4) I use these to create background music for commercials and wedding videos. All this music is royalty free , it just cant be used for a music cd or audio compliation.

Rhondalette:
Yes I did make it myself. (well , made out of loops) I have a pro loop based music program (sony acid pro 6 and sonic fire pro 4)where I can make any song needed.  They are royalty free, but cant be used on a cd or music compliation.

Another wall set by John

With a warmth and richness all its own, this set will satisfy any discerning Sims family.

Here is a set of love songs for 4 stages of a relationship :

First Sight
Romance
WooHoo
Rejected.

Perfect mood music for your sims movies

Here is a chroma key wall set for all who want to put their sims in other environments . For those who have never done chromakeys, there are a lot of tuts out there, just do a search. These are good for stills as well as movie files.
What I did was build a 2 wall set and added a lot of lights to make sure there were no shadows against the wall. Also, don't put a sim character closer than 2 or 3 tiles from the wall.  
John

Another song for your Sims...

Just wondering what your system specs are.
Are you having video drop out issues?
Have you noticed any probs when you're playing a video file?

Have you just installed an expansion pack ? If so, you have to use the bodyshop in the newest expansion. ((eg seasons)C:\Program Files\EA GAMES\The Sims 2 Seasons\CSBin\ts2bodyshop.exe.) Right click on the .exe file and choose create shortcut then pull the shortcut to your desktop. None of the other exes will work after that. After you package your sims, it will tell you where your sims was saved to . Just double click that file and it will install to your downloads. you can then move it to your saved sims folder if you want.

A sign of the coming Apocalypse?. Not really . I had a similar prob , turned out i had a bad water hack. I know that seems simple, but did you download any kind of hack or plumbing fixture before this started happening?

Here is a song for your sims. Its called Bad Johnny and comes from my music library ( I'm a pro video editor). Its fully licensed for games and sims videos, but can't be used in a music compilation or cd (sorry).
Enjoy

Id try just your head meshes as that seems to be where the prob is

The default meshes are still in your game, they are just being over ridden by some meshes in your downloads folder. I would remove meshes 1 at a time (sorry) and see what the offending mesh was or if you knew what mesh your wonky characters were built on, i would delete those and see if that helps.

My guess is that the meshes you are using for your custom characters  are not seasons friendly. Try reloading the default maxis meshes or mod some of the chracters here and see if that helps.

After doing a lot of reseach and spending a lot of sleepless nights (not really)
It seem that the prefered maxis codec is the on 2 codec. (its installed when you install the sims 2) This codec is used for the sim movies by default. That way, everyone will have a common codec to share vid files.