Here’s something we’ve been doing for the past 6 months that I think is a simple best practice. I don’t have any data to back this up, so you’ll just have to take my word for it. 
When articles have an embedded video, I use a custom label “Watch” to visually call this out. If an article has the content both written and as video, I’ll use “Watch or Read”
Labels show up in various feeds on the community:
- Main activity feed
- Search results
- Feeds within categories
As well as on topic cards if you feature them on a landing page.
In the absence of a video “content type” (and not sure we need one with embed options), this is a way to give a visual cue to users that content is more dynamic and to entice them to click in. And/or if they learn best through video, they’ll see a visual cue for content that matches their preferred style when searching or scrolling through a feed.
Again, it’s mostly theory and I don’t have data to back this up. But I’m pretty confident in the behavioral hypothesis behind it.