Not seeing near as much of it now.. but the videos would get flagged and removed way before the product was even available for the public to buy.. therefore, only marketers knew from places like this forum it was going to be available.. they would search for product name, find my video and flag it.. obviously so it would not be in front of their video or review site ..
Because of the refund rates and other hassles in this niche, I have been focusing mostly on software products where I only have a 10 - 15% refund rate and from the MANY videos I have made.. only 1 or 2 have been flagged. I have also been picking some high dollar products from Amazon. One particular example would be gas generators. I make a short review, post it on YT and get some killer traffic and sales.
I use Camtasia Studio 8 for all my videos.. it does an amazing job and is WELL worth the investment and short amount of time to learn it.