According to a report in Recode, Facebook is to start testing "mid-roll" ads in videos, and the company will be sharing revenues with the video publishers.
For now, Facebook will sell the ads and share the revenue with publishers, giving them 55 percent of all sales. That’s the same split offered by YouTube, which dominates the online video ad business. Report: Facebook Plans to Show Ads in Videos [recode.net]
This might mean an opportunity for video publishers to earn revenues, and, importantly, for Facebook to add further revenue earning opportunities.
I do wonder how this will affect users and whether they will become tired of the interruptions.