Poorly written php code

Ok
we got a new problem that arose, our 10 minute video lessons that we posted in flv stopped playing. Our server is telling us that either videos that should be requesting 1 to 2 mb are requesting up to 37 mb, kicking an error….not enough php disk space.
The one that were not You tube we had to just put a download, unable to embed.

Now AT&T our hosting co..(worthless by the way) is saying that my PHP code is poorly written………or we have a severe leakage!
please enlighten me in layman’s terms

1. is this true?
2. is there anything like a easy plugin fix….?????
3. is in the template, or would hanging templates help???

please Help, this is way over my head!

3.01,
firefox
wsopne.org