A million $ is not that much, hiring coders, promotion like adwords, some radio commercials and hiring a bunch of women to make some great looking profiles
Also there is the fact that people aren't very handy and most of them have trouble to upload a picture of themselves so you would need to supply some service to help and assist them in getting their videos online + the bandwidth costs and the fact you need enough reserve capital not to go out of business in the first year, perhaps 500K would be enough, it's just a rough idea.