about 95% of the reviews on "review sites" are fake.
you can buy a video review for $5 on Fiverr, you write the script of what you want them to say and they do a review of the product, a product they never even seen or used.
Your best bet is to either get a legit review from the Clickbank vendor and get permission to use them.
I found out that actually buying the product you are promoting and doing a honest review of it sells a lot more...as then you can show what the "inside" looks like. they know that you actually bought the product and used it so they now trust you.
If I bought the product and it sucked i simply said so and then ended with "but I really like this product because...."
In the past, I made the most money showing what the user will get once they buy, as the sales video the vendors have simply hype up the product, they show nothing about the product.
I will be launching my CB product very soon and in my professional sales video i am simply showing the user what the backend looks like, how they can use it to make more money and what to expect after you purchase. There are very few CB vendors who do this but I think it is the way to go to not only make more sales but to cut down on the refunds....
Best of Luck
Ryan