Linkchecker for media files. Need help.

[JuliyaB]

I'm working with site that has a lot of video content (flv & mp4).
Some of the files are local, but some of them are from partner's projects.

Is there any link checker for such kind of stuff, for remote media files? It's not enough to check that link to the file return 200.

Very often partners are removing files but instead of 404 page their site still sends 200 code and some kind of sorry page. But it kills flash player on my page of course, and as result I have page with dead content.