The random "pretty" girls that have been mentioned can't possibly be taken seriously with their boobs out or squealing/pouting at the camera. This is obviously their hook, ooh, the novelty of a girl who is a gamer.
I'd rather watch a fat middle aged man (Richard Leadbetter at Digital Foundry/Eurogamer) review hardware, because he knows his stuff and is in it for this reason alone.
If OcUK want to be taken seriously, bin this idea completely. Get people who know their stuff and are passionate about hardware, not attention whores.
What's the aim of these product videos? To get an unbiased review of a product? (as mentioned by other members, a review of a product sent for free to a YouTube attention whore isn't going to be unbiased, is it?)
Hell, send stuff out to members, get them to review a product and you'll no doubt get honesty, while rewarding loyal customers (I know that forum membership does not equal loyalty to the company, but this can be checked if need be).