Reddit is rolling out autoplaying video ads on mobile and desktop for standalone ad campaigns, but this rollout will not add pre-roll ads to videos
and yes, they autoplay Allison Schiff / AdExchanger : Advertisers Can Now Buy Video Ads On Reddit reddit.com : HardwareReddit brings autoplay native video ads to desktop and mobile See also Mediagazer
Context & Ripple Effects
This is the second act of a build-out that started a year earlier, when Reddit announced its first video ads alongside a redesigned ad-buying platform and self-service products. What was missing then was the format itself working natively in the feed — and the inventory to fill it arrived when Reddit opened native video uploads up to 15 minutes long.
Autoplay is also table-stakes by now: Twitter normalized the behavior back in 2015 with its own auto-play video and GIF rollout, so Reddit is catching up to a standard rather than setting one. The notable choice is what Reddit is NOT doing — no pre-roll ads inserted into videos.
First-order effects
- Advertisers gain a standalone autoplay video campaign type across both mobile and desktop, giving media buyers a native feed format they previously had to approximate with static or link posts.
- Users see videos playing automatically as they scroll, but organic videos remain free of pre-roll interruptions — Reddit is monetizing the feed, not hijacking playback.
Second-order effects
- A richer brand-ad format sets up the performance side of the house: months later Reddit followed with cost-per-click ads after a beta with 50+ advertisers, its first performance-driven bidding product — the sequence suggests brand formats were the prerequisite for selling performance.
- Twitter and other social platforms now face a fully equipped Reddit competing for the same video ad budgets, pressuring them to differentiate on targeting and measurement rather than format availability.
Third-order effects
- If the pattern holds, Reddit keeps assembling the full social-advertising stack — brand video, CPC bidding, and eventually commerce, as seen in Dynamic Product Ads using shopping signals — narrowing the capability gap with Meta and Google and making Reddit a line item in mainstream media plans rather than an experiment.
The trend: Social platforms are converging on autoplay in-feed video as the default ad unit, with late adopters like Reddit racing through the same format-to-performance-to-commerce ladder their rivals climbed years earlier.