Hi Ben, This is a great plugin.. I have a couple of requests for the next version if possible... Could you implement a hook after the video has been uploaded and the meta data is stored in the db - with the actual video ID from youtube. As this happens after the general gravity form hooks this would be really useful.
Also, When you edit an entry in gravity forms - the plugin displays the field type - and I think the code attempts to insert a hidden field. I am not sure this is working as when you update the record... all references to your uploaded asset in the meta tables file dissappears.
I have found a work around for both these items (including adding code to your plugin) for my project - but thought these features maybe useful to others.