Level Up Labs co-founder Lars Doucet has created and deployed a Wikia directory page called WhoLetsPlay that informs video content creators which publishers allow monetized Let's Play videos and which do not. The Wikia page divides publishers into three groups:
YES - Allows Let's Play AND allows them to be monetized.
MAYBE - Might allow monetization under some circumstances, or it is unknown.
No - Does not allow monetization.