Use clear film rather than black film because the clear plastic will transmit more solar radiation and increase the temperature of the soil. (fieryfoodscentral.com)
But it's made pretty clear the film is personal with the use of his real - life son and shooting the film in his actual home. (waytooindie.com)
I am old enough that I have both observed and given presentations on clear film with an old school overhead projector. (slaw.ca)