How Do You Promote a Flash Sale on Instagram Feed?
If you've already written a flash sale brief for Stories or Reels, don't start over for the feed. The same brief re-renders at 1080 × 1080, so the discount, the deadline and the product shot stay put — only the crop and pacing change. Feed autoplays muted and square, so the price and the countdown need to read without sound in the first three seconds. Keep the same opening shot, tighten the on-screen text, and let the studio produce the square version as a second render from the version you already approved. Ten to twelve seconds is plenty for a feed post; anything longer and the scroll wins.
Formats
1:1 · 9:16 · 16:9
Length
5-60 seconds
Where it runs
Instagram feed, Facebook feed, Instagram Reels
From the guide to Instagram feed
Posting to Instagram and making variants
Review the finished MP4 in the studio, then post it to Instagram from there without exporting anything. Keep the same brief and ask for a 9:16 cut for Reels and Stories and a 16:9 cut for your website. Every version stays available, so a seasonal post can be re-rendered with new photos or a new price instead of being written again from scratch.
Instagram feed videos that hold a scroll in a square or vertical frameFrom the guide to flash sale
Headline, offer and call to action
The headline is the deal and the window together: "Half price, today only." Keep the offer specific about what is included and what is not, so the comments do not fill with questions. The call to action is one verb and one place: "Shop now at the link." Narration can read the deadline out loud while subtitles keep the prices on screen for anyone watching without sound.
Run a flash sale with a short video that shows the discount and the deadlineA brief you can paste
Paste this into the studio chat, or change the names and numbers first.
Re-render my flash sale brief as a 1:1 for Instagram feed, 10 seconds. Same opening as the 9:16 version: the red 40% OFF sticker landing on the product shot. Keep the countdown text (ends tonight) but move it up so it clears the caption. Same track, cuts still on the beat. End card: logo, discount code, and link in bio. No narration needed for this one.
Questions people ask
Can I use my Story or Reel flash sale video in the feed?
Not directly — the feed crops to square or reads awkwardly at 9:16 in a scrolling grid. Ask for the same brief re-rendered at 1080 × 1080 instead; it reuses the shots, text and music from the version you already approved, so it's a smaller quote, not a new brief.
How long should a flash sale video be in the Instagram feed?
Ten to twelve seconds holds attention in a square, muted-by-default grid. Anything past fifteen and the deadline message competes with the next post before the offer lands, so keep the discount and the end date in the first three seconds.
Related guides
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Make this video today
Describe it in a sentence, review the plan and the price, approve, and download the MP4 or post it to Instagram, Facebook, TikTok or YouTube.