Video Formats 16:9, 1:1, 9:16: Which One to Use and When

The rule is simple: 16:9 (horizontal) is made for YouTube, websites and screenings; 1:1 (square) for the LinkedIn, Facebook and Instagram feeds; 9:16 (vertical) for Reels, TikTok, YouTube Shorts and Stories. In other words, format isn’t an aesthetic choice but a direct consequence of where the video will be watched and what you want viewers to do. The same video shown in the wrong aspect ratio loses screen space, readability and, inevitably, attention. This guide breaks down the three formats, their specific uses, the trade-offs to know about and the mistakes that cost you dearly in editing.

Understanding what an aspect ratio really tells you

A video format is expressed as a width-to-height ratio. 16:9 is wider than it is tall: it is the historic “landscape” format of television and computer screens. 1:1 is a perfect square. 9:16 is the reverse of 16:9: taller than it is wide, it matches the way we hold a smartphone. At standard resolution, 9:16 is 1080 × 1920 pixels, and 16:9 is 1920 × 1080 pixels.

What actually changes is the screen space taken up and the viewing orientation. On mobile, a vertical video fills the entire screen, while a horizontal video only takes up a band in the middle, with the rest left empty or black. This difference in surface area isn’t cosmetic. Most video consumption on social platforms now happens on mobile, and industry guides, in France and internationally, agree on one point: the formats that take up the most screen space (vertical and square) capture more attention than 16:9 on these surfaces. On a large screen, by contrast, 16:9 offers the most natural viewing experience.

16:9: the go-to format for the web and demos

16:9 remains the standard format for professional video. It is the one you want for the presentation video at the top of your homepage, for a detailed product demo, for long-form YouTube, for screenings at trade shows or in meetings, and for embedding in any sales presentation.

Its strength is width: it lets you show a software interface, a diagram, a before/after or several elements side by side without squeezing them. For a SaaS explainer video that needs to make a dashboard readable, 16:9 is almost always the right choice. It is also the format that ages best: it serves as the “master” from which the other ratios are derived.

Its limit: in a mobile feed, it looks small and gets upstaged by more immersive vertical content. So 16:9 isn’t a “scroll” format; it is a destination format, for when the user has already decided to watch.

1:1: the feed compromise

The square is the format of feeds: LinkedIn, Facebook, the Instagram feed. It takes up more height than 16:9 as people scroll, without switching to full-screen vertical. It is an excellent “Swiss Army knife” format for a B2B social media campaign where you want to stop the scroll without producing strictly TikTok-style content.

1:1 has another practical advantage: it is easy to reframe. A video designed with the action in the center adapts painlessly from square to vertical or horizontal. Many advertisers also treat the 4:5 format (slightly taller than square) as a variant of 1:1 to gain a little more space in the feed; on Instagram, 4:5 has even become the recommended ratio for feed videos. For platform-by-platform social media use, see our dedicated guide to motion design for social media.

9:16: the native format for mobile and discovery

Vertical is the format of discovery: Instagram Reels, TikTok, YouTube Shorts, Stories. This is where the algorithm pushes new content to audiences who don’t know you yet. A notable fact for B2B: LinkedIn now highlights 9:16 vertical video in a dedicated video feed, confirming that the format is no longer reserved for consumer audiences.

9:16 calls for a different visual grammar. The pace is fast, with a hook in the very first seconds, on-screen text that is readable on a small screen, and a vertically centered composition. It isn’t a “rotated” 16:9: it needs its own script, often a shorter one. For the ideal length, check out our article on how long a presentation video should be.

Comparison table of the three formats

How to choose: start from the goal, not the format

The right method isn’t to ask “which format is best” but “where and why will this video be watched.” Three questions are usually enough to decide.

1. Where will the video mainly be shown?

Website and YouTube: 16:9. LinkedIn or Facebook feed: 1:1 (or 4:5). Reels, TikTok, Stories: 9:16. If one channel clearly dominates your strategy, start from its format and adapt the others afterwards.

2. What needs to be understood on screen?

If the video shows a complex interface, a diagram or several pieces of information at once, 16:9 protects readability. If the message is simple and emotional, vertical serves it very well.

3. Are you aiming for discovery or conversion?

Audience discovery happens in vertical; conversion on a product page or in a demo happens in 16:9. Many B2B projects need both, which is why it pays to plan for several formats from the start.

The most common mistakes

• Posting an uncropped 16:9 video to a vertical feed. Black bars at the top and bottom waste screen space and signal content that is “not made for the platform,” which algorithms tend to penalize.

• Framing too close to the edges. Every platform overlays its interface (buttons, caption, profile) on the edges of a 9:16 video. Text or a logo placed right at the bottom of the frame will be hidden. You need to plan for safe zones.

• Forgetting subtitles. On mobile, a large share of videos start without sound. Subtitles aren’t optional, especially in vertical.

• Adapting a format at the last minute. Reframing cleanly requires the animation to have been designed for several ratios upstream, at the storyboard stage, not in the final edit.

One master, several versions

The smartest way to save isn’t to choose a single format, but to design the video to be adapted. A well-run project produces a master (often 16:9), then its square and vertical versions, with text and framing repositioned to suit each one. It is the most cost-effective approach: you cover your website, the feed and discovery from a single production, instead of ordering three separate videos. This approach works just as well for 2D or 3D motion design, since the adaptation principle stays the same.

What about Motionlab?

Motionlab, a motion design agency based in Paris (231 rue Saint-Honoré, 75001), delivers all three formats, 16:9, 1:1 and 9:16, to cover your website, social media and campaigns. Every project is handcrafted by qualified French motion designers (nothing is AI-generated) and includes script, storyboard, voiceover, licensed music and sound design. Formats are planned from the storyboard stage, which avoids botched reframing. 10-day delivery, unlimited revisions and a free quote. Budget-wise, expect €1,500 to €8,000 excl. VAT depending on length and style, with a 60-second video usually falling between €3,000 and €4,500 excl. VAT; you’ll find the details in our guide to motion design video pricing. Motionlab is rated 4.9/5 from 44 reviews, with more than 65 clients served.

FAQ

Which video format should I choose for LinkedIn?

LinkedIn supports 1:1, 16:9 and 9:16 vertical. Square (or 4:5) remains the most versatile for the feed; vertical is gaining ground for short, native content, which is now highlighted in a dedicated video feed.

Does the 9:16 vertical format really perform better?

On mobile, vertical fills the whole screen and matches discovery surfaces (Reels, TikTok, Shorts). Industry guides rate it the winner for visibility on these platforms, as long as it is designed natively and not hastily cropped.

Can I use a single video for every channel?

Rarely to best effect. It is better to produce a master and then adapt it into square and vertical versions, with tailored framing and text. That works better than a single video stretched across formats that don’t suit it.

Should I shoot in vertical from the start?

In motion design, there is no “shoot”: the animation is built pixel by pixel. So a project can be designed for several ratios at once, as long as it was planned at the storyboard stage.

Is 16:9 outdated?

No. It remains essential for websites, long-form YouTube, product demos and any screening. It is simply less suited to mobile scrolling, where square and vertical take over.

Which format should I use for a video on my homepage?

16:9 is the default choice for a company presentation video embedded on a website, because it fits naturally into the page width and offers the best readability for interfaces.

Take the next step

Not sure which formats to plan for your next video? The easiest way is to talk it through based on the channels you actually use. Book a free discovery call with Motionlab: schedule a call here. Together, we’ll define the master and its 16:9, 1:1 and 9:16 versions, delivered in 10 days with unlimited revisions.