For the first couple, it is possible to simulate zero gravity on Earth, in a plane descending with enough speed. FEers will probably just say those videos were taken like that, possibly from several such journeys with footage stitched together (there are a couple of cuts). Then they just lip-synced to replace the audio. Or it's all just cg.
I expect their evidence would be "They sound surprised in the second one! How can they be amazed if they've been in space for a while? Must be fake."
Good videos though.