what are my options for video adverts?

I am struggling to find any up-to-date information on this topic - I have a game nearly complete written in c#/mono that I hope to release pc/android/ios. For the mobile variant I’m intending to offer the popular “watch this, get this” advert system.

Are there recommended libraries for integrating with monogame for each platform? Anyone here done this before?

Thanks in advance!