You won't have much luck as Google has a strong stance about discussing policy outside of whom it employs or has NDAs with.
I perused a little more and it seems partners have a possible loophole. In monetization options, there is an option for paid product placements. However, there is a section of the FAQ for placements mentioning baking in prerolls, but nowhere is it clearly defined if we can include direct links (or affiliate links provided by the sponsoring organization) to the organizations for whom we make such videos.
In fact that Paid Product Placements are allowed would appear to be in direct conflict with the Terms of Service (4D):
I sent a message to partnersupport about this, but I doubt I'll get a response. Can anyone testify as to whether partners have such an exemption. It would seem they do as long as the video conforms to other policies, and the placement adds value to users.