Re: In general, this approach sounds like a good idea.
When those with expertise get it so wrong,
https://www.eff.org/press/releases/important-win-fair-use-dancing-baby-lawsuit
what hope does your reasonable person have ?
Even if a reasonable person could tell an infringing item if they saw it, how many reasonable people should you have to employ to check?
http://tubularinsights.com/hours-minute-uploaded-youtube/