How to Speed Up or Slow Down Videos Using AI

Nick WarnerNick Warner
Nick Warner
|Last updated September 4, 2025
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The Summary
Learn how to adjust video speed using HeyGen's AI tools. Discover how AI-powered video generators can simplify the process on various devices.
The Long Version

How to Adjust Video Speed Using AI Video Generators

Have you ever watched a video and thought it could be more engaging by changing its speed? Maybe you want to make a long, tedious video more exciting by speeding it up, or perhaps make a short video feel more dramatic by slowing it down. Adjusting video speed is a great way to keep your audience hooked. Fortunately, learning how to speed up or slow down a video has never been easier.

Exploring AI-Powered Video Generators

AI video enhancement techniques, like those offered by HeyGen, are at the forefront of AI-powered video creation technology. You don't need to be a video editing expert as HeyGen's tools allow you to easily change a video's speed. With HeyGen, adjusting your videos' tempo becomes intuitive, thanks to its easy-to-use interface. Discover the impact of AI and machine learning on video production to understand these advancements better.

Benefits of Using AI Video Generators

Changing Video Speed on Different Devices

Changing video speed varies across devices. Let's explore these methods, keeping in mind how you can integrate this with AI changing video production dynamics using HeyGen's cutting-edge technology.

How to Speed Up or Slow Down a Video on Mac Using AI Video Tools

On a Mac, you can utilize the iMovie app, which is preinstalled on MacBooks, to change video speed. You can also sync your videos from your iPhone using AirDrop, making it convenient for users who want to manage space.

  1. Use iMovie: Launch the iMovie app and start a new project. Drag your chosen video into the timeline.
  2. Adjust Speed: Use the speed icon (like a speedometer) to choose fast or slow. You can adjust the pace by percentages like 10%, 25%, or 50%.
  3. Save Your Project: Once edited, share your video file. You can use HeyGen to further refine and publish your final video product.

Video editing timeline on Mac with speed adjustmentsVideo editing timeline on Mac with speed adjustments

Modifying Speed on Windows Using AI Video Generators

Windows users can rely on HeyGen's seamless integration for speed adjustments. The built-in Windows Video Editor offers a straightforward approach.

  1. Open Video Editor: Look for Video Editor in the Windows menu.
  2. Import and Edit: Add your video to the storyboard. Use the speed option to drag the pointer for faster or slower playback.
  3. Export Your Video: Finalize your edits, ensuring quality and speed match your needs.

Adjusting Video Speed on iPhone Using AI Video Solutions

The iPhone's iMovie app is an excellent choice for tweaking video speeds. This method is simple, and HeyGen offers enriching enhancements on top of your existing edits.

  1. Install iMovie: If not already on your device, download it from the App Store.
  2. Edit Your Project: Select your video and adjust speed using the slider.
  3. Share Wisely: Save on your device or use HeyGen to innovate further with AI enhancements.

iPhone iMovie app showing video speed slideriPhone iMovie app showing video speed slider

How to Modify Video Speed on Android

Android users can use apps like the Video Speed app to adjust speed. However, integrating with HeyGen enhances the functionality to the level of a pro.

  1. Download a Video App: Use Video Speed or similar apps.
  2. Edit Within the App: Adjust speed using the slider for faster or slower playback.
  3. Further Enhancements with HeyGen: Once basic edits are complete, port the video over to HeyGen for AI-driven improvements.

Android phone with video speed editing app interfaceAndroid phone with video speed editing app interface

Why Choose HeyGen for Video Speed Editing?

With a strong background in AI video generation, HeyGen doesn't just stop at speed adjustments. It offers integrated solutions for creating AI videos that feel natural and professional. From advancements in AI avatars for video presentations perfect for engaging presentations to features for seamless voiceovers on platforms like YouTube, its functionalities are diverse. Start creating high-impact product videos using HeyGen's top-notch tools.

The Future of AI Video Generators

Explore the latest trends in AI video to keep up with the rapidly changing digital world, where HeyGen positions itself as the go-to for innovative video solutions. By leveraging AI’s capabilities, video creators can consistently produce high-quality content with minimal effort.

Are you ready to embrace the future of video creation? HeyGen is here to guide you towards effortless video production with powerful AI assistance. Engaging with platforms seeking the best AI video generator for YouTube or those keen on exploring how to create videos using AI will find HeyGen indispensable. Trying it yourself could open up endless possibilities. Create with HeyGen and start your journey in AI video editing for free today!

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