A large share of video advertising in social feeds plays silently by default. That single playback decision changed how the creative has to be built.
Autoplay without audio was a product choice
Feed platforms autoplay video to make content start without a tap, and they mute it because unexpected sound in a public place drives users away.
Audio then becomes something the viewer must deliberately enable, and most viewers do not, particularly during brief sessions.
Any information carried only in the voiceover is therefore unavailable to the majority of the audience the advertiser paid to reach.
The message has to survive with the visuals alone
Creative built for television places the argument in the narration and uses images to support it, which inverts badly in a silent feed.
Feed-native work carries the argument in the frame: the product in use, the problem being solved, and on-screen text that states the point directly.
Captions do part of the job, but text designed to be read in a feed differs from a transcript, since it must be legible at a glance on a small screen.
Opening seconds carry disproportionate weight
Because the viewer is scrolling, the decision to keep watching is made almost immediately and without the benefit of an audio hook.
This pushes recognizable elements forward, so brand and subject appear at the start rather than resolving at the end as a reveal.
Structures that build toward a punchline lose most of their audience before it arrives, which is why the same script performs differently in different environments.
Framing changed along with the sound
Vertical or square framing fills more of a phone screen, and wide compositions shrink the subject to a size where facial expression and product detail are lost.
Text placement has to account for interface elements that overlay the video, since captions and buttons can obscure the lower portion of the frame.
These constraints are specific enough that adapting an existing spot rarely works as well as shooting with the format in mind.
Sound still matters where it plays
Connected television, audio streaming and click-to-play placements deliver sound reliably, and creative built for silence underperforms in those settings.
Advertisers running across both therefore maintain distinct versions rather than a single master cut down to different lengths.
Treating sound as an enhancement in one environment and as the primary channel in another is the practical resolution, and it is a production planning decision rather than an editing one.