Make YouTube Shorts From a Long Video Automatically (3 Ways)

Automatically creating Shorts from a long video saves most creators between 3 and 5 hours of work for every long-form piece they publish. The manual process is a significant bottleneck.

For a single 20-minute product review, a creator might have to scrub through the timeline to find 10-15 potentially interesting moments. They then have to slice each one, reframe it from a 16:9 to a 9:16 aspect ratio, manually add and time captions, and export them individually.

Using traditional software like DaVinci Resolve or Final Cut Pro, this process can take an entire afternoon. The core issue is discovery; finding the most engaging 60-second segment in a 30-minute podcast is inefficient.

This tedious work prevents creators from maximizing the reach of their primary content, leaving views and subscribers on the table. Automating this workflow is the single biggest efficiency gain a video creator can implement in 2026.

Dedicated AI clipping tools offer the most direct solution. Platforms like Opus Clip and Vizard.ai are built specifically for this task.

The workflow is simple: you paste a YouTube link or upload a video file. The AI then transcribes the entire video, analyzes it for the most engaging or 'viral' moments, and automatically generates a dozen or more short clips.

These clips come pre-packaged with animated captions, 9:16 reframing, and even a 'virality score' to help you choose the best ones. For example, Opus Clip's Starter plan costs $15/month for 150 minutes of video processing credit.

The main advantage is speed—turning a one-hour podcast into 15 ready-to-post Shorts can take less than 10 minutes. The primary drawback is a lack of fine-grained control; the AI sometimes cuts sentences awkwardly or misunderstands context, requiring a quick review before publishing.

These tools work best for content that is primarily dialogue-driven, like podcasts, tutorials, and commentary videos.

For creators who want more control, professional video editors now include AI-assisted features. This is a semi-automatic method.

For instance, Adobe Premiere Pro (v24.0 and later) has a feature called Text-Based Editing. It provides an automatic transcription of your video, and you can edit the video by simply cutting and pasting the text in the transcript panel.

To create a Short, you find a compelling sentence or paragraph, copy it, and paste it to create a new sequence. You can then use the 'Auto Reframe' tool to automatically adapt the 16:9 sequence to a vertical 9:16 format.

This approach is more hands-on than dedicated clippers but much faster than fully manual editing. The cost is part of the editor's subscription, such as Premiere Pro's single-app plan at $22.99/month.

This method is ideal for editors who need to maintain precise brand standards or make specific creative choices the AI clippers might miss.

A third approach is not to clip the original video, but to recreate its key points using a text-to-video AI generator.

This method is useful when the original video's visuals aren't engaging or when you want to create a teaser-style Short.

You would take the script from your long-form video and feed key sentences into the generator.

For example, a creator could take the line, "The new CPU cooler keeps temperatures under 60°C at full load," from their review script and use a tool like FluxNote to generate a 10-second video.

The AI would find stock footage of computer components, produce an AI voiceover of the line, and add animated captions.

This process takes about 2 minutes per clip and is effective for creating supplementary content that drives viewers to the full video.

This is a powerful way to repurpose the informational value of your content, not just the visual footage.

Choosing the right method depends on your budget, time, and desired level of control. Here is a direct comparison for creating 5 Shorts from a single 20-minute video:

For most creators focused on efficiency, a dedicated AI clipper like Opus Clip offers the best return on investment. Its low time requirement allows for a consistent output of short-form content.

Editors who need pixel-perfect results will prefer the control of Premiere Pro's AI features. AI generators fill a specific niche for creating promotional assets that complement the original video rather than just clipping it.

Many creators end up using a combination of these tools for different purposes in their content strategy.