Feel free to message me on this. I am looking for a good csv template I can use for SS, Pond5 and others. can I build one template for all? if not which should I use and the best way to modify it for other sites.  Thanks.  Yes looking at the non-exclusive route.

The headers are different for each site what is the best work around or will the site ignore the extra boxes

Thanks, I think I have got it!

The best thing is use Expressions Media for your master captioning/keywording program. It has many many options to output the metadata in whatever order you want from which you can generate CSVs very easily for any agency.

does that work for video files?

It works for all kinds of media. There is a glitch with one codec at 4k I have seen which may be an issue. There are workarounds for this but other than that it's quite nice. I find it becomes the central hub for distribution since its easy to drag whatever media you want off to an ftp uploader. I wish there were one really good asset management system. It sure isn't Lightroom.