After rolling out the Value Rules, Meta has now introduced a new ad enhancement called “RELATED MEDIA” that basically adds media pieces from other active assets to the ad item that you pick.
This is very similar to the “Flexible” ad format where you can put different creatives within one single ad item but it’s not exactly the same as this appears as an ad enhancement so you are actually not changing the format
Also, this does NOT appear within the Ad vantage+ creative enhancements popup that you always have to close when uploading a new creative.
Let’s see if this really makes an impact because it really suggests to mix videos and static banners in different formats.