[jameslevy]

It's worth noting that while YouTube could always run ads in your video, it is very rare to see ads in these types of videos. Ads are usually shown by high-trafficked videos, entertainment content, etc.

It depends on the product category you're in, and as always YMMV.

[bbddg]

YouTube will only show ads for videos that either use copyrighted content in some way (usually music) or are videos by a YouTube partner and they have a deal with Google to split ad revenue for the video.

This video would never have ads on YouTube.