No, TMDB will not earn anything by paying for you to watch their hosted videos, consider that they have to pay for storage, traffic and more things that are being hosted on Amazon which is a very expensive service. That script they use on that site is a very well known ponzi scam script where they encourage you to invite people and increase your earnings, sometimes they ask for minimum amount to join and sometimes they "give" you, but in reality they are using other people's money if they pay... and if they don't pay, they put very high minimum withdrawal limits that you will never reach but you are generating profits for them.
If you want to make money watching trailer better make your own site, put some company advertising and you can monetize it as a review site.
