No you couldn't manufacture a 777 in a couple of days but you could buy one. I know a person who buys plane parts as well as planes, and it's really not that difficult. expensive maybe, but not difficult.bottom line if all that is recoverd is video footage, then it wouldn't be that hard to fake. The hoax wouldn't even have to take place at the bottom of the ocean, any dark, cloudy water would do. for example, in a body of water such as loch ness even fifty feet below there is hardly any ambient light. my point is it wouldn't be hard to fake deep sea footage with enough money and determination.