Not sure about how many meters of Filament. What you can do is use a gcode viewer or analyzer (website of the one I use: gcode.ws) and that will tell you pretty accurately how much filament is needed :) I have personally only used PLA but I think the general consensus is that PLA is better for beginners, being more forgiving in terms of proper temp ranges and adhesion and all that good stuff.
About the CC, Yes! Thx for asking about credit. That's really cool. I'd really like to see the mask help you guys with the short movie. If at all possible please comment here when you guys are done with a link or something to the video. Best of luck!