Fail with "YouTube said: Invalid parameters" - no error thrown

[holybladder]

I've been building a batch-downloading script around youtube-dl, and a few videos have just started failing with this error. Youtube-dl fails to download them, but then outputs a 0 (which caused my script to hurl all its configuration files into its output directory - secondary check needed I think :) ) - any idea why this is happening, or if there's a fix?

[holybladder]

Okay, apparently this was down to my own noobness - have solved the problem by checking stderr instead of exit status :)