Discussions

2000 Success – clips retrieved
1000 Still processing – try again later
4001 Invalid API key
4002 Clipping failed
4003 Rate limit exceeded
4004 Unsupported video format
4005 Invalid video URL
4006 Illegal parameter
4007 Insufficient account time
4008 Failed to download video

this list of output codes on retrive works for some, but, this doesnt explain a couple things.
4002 and 4008 arent issues with the end user, and in these cases, the credits required upfront for processing the videos (though in these cases shorts arent made) arent automatically reimbursed on failure.

id suggest clarification in API documentation on these cases.