Okay, I admit some of my favorite videos on Facebook are things like dogs smiling, recipe videos, Dr. Jane Goodall releasing a gorilla back to nature, and a salsa dancing golden retriever.

And guess what? I watch all of them with the sound off. To marketers, that is autoplay video with sound. As much as 85% of video views on Facebook happen with the sound off, according to multiple publishers. Most of us have news feeds full of short videos that feature text or captions narrating what is being seen on screen. The videos usually have narration, music and sound effects, but marketers make sure the videos can be understand without sound.

The new rules seem to be that you have to catch someone’s attention in three seconds and without sound. According to MEC North America, their branded videos average 85-9o% silent video views. Silent doesn’t mean consumers are less engaged. Internal studies conducted by the agency showed that KPIs like brand lift and intent to purchase were not affected by whether the viewer watched the video with the sound on or off.

So here’s the new rules for Facebook video, make sure your content can be understood without sound by adding readable captions, easy-to-understand visuals and an engaging start to capture their attention.