How do you come up with metrics that properly track meaningful attention, not just playcounts? (Probably no impression is completely meaningless, but some are definitely more meaningful than others.) What do you do about audio? The best implementations I’ve seen start autoplay in silent mode with captions. Unexpected autoplay audio is a deep annoyance — motion and text, not so much. And there’s a lot of experimentation to be done with text-heavy video, particularly on the news side. I believe silent with captions will become an emerging standard, both on big platforms and on publishers’ sites.