Metadata submissions are iffy at best. Most don't function - at least when I have tried. iSyincia used to do if for my files with some success - at least for the title and key-words. The replacement service,
www.picworkflow.com doesn't do it for video, yet. It's cut and paste for me still. It will probably continue that way, as the backends for the major submission sites all seem to be organized differently with no consistent protocols. Some, such as ClipCanvas, want you to have the critical keywords first in the list and have no categories to set. But they don't limit the number of keywords. Pond5, orders the keywords in no particular order, and has a proprietary set of descriptions you click on which plugs into their internal search (as does iStockphoto). The key-word limit at Pond5 is 50. None of these talk to each other. Don't hold your breath.
Visit my blog at
www.stockvideoseller.com for a guide to the stockvideo business.
