What this headline should say is: YouTube Videos Losing to Facebook Native Videos… on Facebook.
That seems a bit obvious, but this research does show how dramatic the difference is: Facebook native videos accounted for 84.47 percent of all videos on Facebook (more than 5 million posts) while YouTube accounted for 10.22 percent (more than 600,000 posts).
And perhaps more importantly, engagement (i.e., reactions, shares, comments) for Facebook videos was 109 percent higher than YouTube videos.
Have you replaced YouTube videos with native videos on Facebook? What results are you seeing?