I'm moving from mp3s to mpgs nowdays.
And immediately I realise that there are some mpg files which you can't play. It downloads alright, but just doesn't play when you try to open. QT won't even send out an error message. You can't tell from the outlook because when download is completed, they look like a perfectly normal QT file.
For instance, "The Sim*son* Too H*t f*r TV" (85,583 Kb)

The only way to avoid wasting your time downloading such files is to launch while downloading. If you can't view it then, you won't be able to see it when dl's complete.

But I would be interested to see if anyone has come up with a clever way around this.

I'm on LW2.1, QT 5 (not pro).

Happy Downloading.