One of the most important factors in determining the success of your short-form video is retention. When viewers watch your video to the end and even replay it, the YouTube Shorts algorithm will take note and push the video further. However, for the short video to achieve higher retention, it should be of the right length and format.

If your YouTube Short is too long, it will struggle to achieve high viewer retention. On the other hand, a too-short video can make it hard to convey your points. When you leave your viewers hanging, they will have a bad experience, leading to low engagement with your videos and a lower ranking. Therefore, understanding the length is an important factor when scaling your YouTube Short growth strategy. In this article, we guide you on the best short length and format to increase your chances of going viral.

How the Length of Shorts Impacts Conversion

Studies indicate that videos between 15 and 30 seconds have the highest retention rates, often exceeding 80%. This is the sweet spot, providing creators with an opportunity to deliver their points quickly and increasing the chances of making their YouTube Shorts go viral. If the Short is less than 10 seconds, creators may struggle to convey their points, leaving it feeling incomplete and lacking substance.

On the other hand, a Short that is more than 45 seconds can result in significant drop-offs unless you are creating content that is exceptionally outstanding. The most important thing is to match the length of your content to the natural rhythm of the Short, rather than trying to force the concept into a particular timeframe.

It's also worth noting that retention varies by niche. If you are creating educational content, you can go with longer formats of 35-45 seconds. On the other hand, comedy and other entertaining content perform better in the 18-25-second range. 

However, one thing that cuts across all niches is the need to provide value. Creators should ensure that every second in a part earns its place. Whether it's an explanation for a concept, you need to pass your points within the first three seconds. If you move slowly, users will scroll away.

A Breakdown of Best Length According to Content Type

The ideal length of a YouTube Short will depend on the type of content you are making. Let us look at the most suitable lengths for different types of content:

How-To Videos and Tutorials

If you are creating educational content in several steps, you will need a longer video. That's why the ideal length for tutorial videos is between 25 and 40 seconds. This length allows you to show the problem, share the solution, and illustrate the results. However, to create this kind of content, you need to edit aggressively, eradicating any pauses, speeding up the B-roll a bit, and using text overlays to show the steps without having to explain them verbally.

A good rule of thumb is to maintain a three-step process for your tutorial. Anything longer than that is best covered in a long-form video.

Comedy and Entertainment

In comedy, timing plays an important role. Statistics indicate that Shorts perform best at 18 to 28 seconds. This allows the creator to have enough time to set up the joke and deliver the punchline without worrying about the viewer’s time. A good comedy Short usually has a callback or twist within the final three seconds to reward viewers for watching to the end. However, make sure the joke is tight enough for the shorts format. If it will require more than 35 seconds for the joke to get home, it means the joke isn't tight enough to fit in a Short.

Storytelling and Behind-the-Scenes Content

If your content is in the form of storytelling, it means it can sustain a longer runtime as long as the narrative is visually dynamic and compelling. Content that provides a snippet of behind-the-scenes or day-in-the-life, or mini blogs, has a sweet spot of 30 to 45 seconds. 

However, the pacing for such content needs to be exceptional, with a story beat or a new visual every 5 to 7 seconds to sustain momentum. You should also aggressively use jump cuts, vary the composition of the Short, and ensure that there is a clear beginning, middle, and end of the Short. If your viewers feel that they are getting value in your Short, they will not have a problem with a longer format.

Choosing the Right Formats for Shorts

In addition to the length of the short video, the Shorts formatting is an important factor. From the aspect ratio to the placement of text, this will impact whether viewers will stay around.

The 9:16 Format

This is the platform that dominates YouTube Shorts, TikTok, and Instagram Reels. It's popular as it provides viewers with a full-screen experience on their mobile phones. It should be the right format for YouTube Shorts, because if your Shorts don't fill the mobile screen, users may feel they're poorly made and may not perform well.

Therefore, your content should be framed to be viewed vertically from the start, instead of repurposing your horizontal podcast clips into vertical Shorts and adding black bars. Think differently about the composition, using large, centered faces, and make sure the text is centered on the screen. Add all the necessary elements at the extreme bottom or top, where the UI elements may be obscured.

Other content formats, which may not work well for Shorts, are:

• 16:9. This vertical format is mostly used for horizontal videos, but the ratio can still be used in certain contexts where the traditional widescreen is mostly preferred.
• 1:1. This is a format that is commonly used for Instagram posts to provide versatility across different devices.

Selecting the right aspect ratio can improve the viewer’s experience and ensure your videos are compatible with each platform's requirements. When you create videos that align with the platform's requirements, you can increase engagement with your short videos.

A good format for Shorts should balance video quality, platform compatibility, and file size. Some of the most popular Short formats are:

• MP4: Lightweight, widely supported, and suitable for most platforms. It's compatible with the H.264 codec, meaning it's a perfect choice for distributing content.
• MOV. This format provides high-quality videos, making it perfect for editing videos before the final conversion. Its main downside is its large file size, which can limit its usability for online sharing.

The standard format for Shorts is usually MP4 with H.264 because it offers a good balance between quality and efficiency, ensuring seamless playback across platforms and devices.

Text Overlays and Captions

According to one study, when Shorts feature burned-in captions, retention increases by 15-25% compared to Shorts without them. Since many YouTube Shorts viewers watch without sound, particularly in public places, captions are now a must-have for videos. 

In addition to accessibility, captions ensure viewers' eyes remain on the screen and reinforce the message. The top captions are usually big, highly contrasting, and help to reinforce the message. They are animated so that they appear phrase by phrase and word by word, resulting in a reading rhythm that aligns with the pacing.

Cut Frequency and Visual Variety

Humans seek novelty, so if your Short can maintain the user’s visual interest through frequent angle changes and cuts, it can enhance user retention. According to data, the best-performing Shorts are those that add a cut every 2 to 4 seconds.

However, you need to ensure the Short is properly edited. Keep switching between close-ups and medium Shots, and use B-roll to support your points. The Zoom effect can help to emphasize important moments. Add text animations and graphics, as every visual change will help lengthen viewers' attention spans, thereby increasing retention.

The Loop Effect

The best-performing shorts also feature a loop effect, where the ending returns to the beginning, resulting in more replays. While the content doesn't have to loop, the final frame should encourage viewers to rewatch or experience greater satisfaction. When the algorithm notices replays, these are weighted heavily, and a replay rate of 10% can increase the distribution of the Short.

In Conclusion

While YouTube Shorts can be up to 60 seconds, studies show that retention can drop significantly after 45 seconds for many types of content. Unless you have one of the content types that requires a higher Short length, a good idea would be to focus on 15 to 30 seconds for better algorithm distribution and higher retention.