**Sorry for this disgusting formatting done by outlook.com, let's hope this version makes it through correctly:**
I had a quick look and this appears really promising. I mean this beta version is already awesome, you can even overlay 3d models to the video... And all the stuff smoothly happens in your browser!
Just a few questions/notes to think about when linking this with Wikimedia Commons:
# What happens if some of the resources disappears from the web or changes its content?
# Flattening of the video Even though this dynamic playback as done in Popcorn Maker as of now is smooth and "just works" in recent browsers, media files embedded into wiki articles should always be a plain/flattened version of this dynamic playback. (Preferrably in .webm) Just think about mobile clients to find the reason to do this. Another reason to allow only embedding of "flat" multimedia files is the possibility of offline playback.
# Storing Popcorn JSON Wherever the JSON is stored, there should be also be a clickable link to load the whole project into the Popcorn Maker.
# What are the current proposals to store the JSON in a wiki?
# Licensing stuff This is probably the hardest part to get right. If some of the videos end up being uploaded to Wikimedia Commons, the file description needs to list every source in all cases as well as author and license in most cases.
# Uploading If the licensing stuff is solved, an easy way to upload the created video to Wikimedia Commons is needed. (Allowing both: Upload to a new file or overwrite an old file which updates the video) The respective Popcorn JSON of the file on Wikimedia Commons should be updated in the same run to match the current version of the video.
Marco