How to Make YouTube Shorts From Long Videos (2026 Guide)
The fastest way to turn one long video into a steady stream of YouTube Shorts -- the manual method, the AI method, and the exact workflow I use.
If you publish long-form video and you are not slicing it into Shorts, you are leaving most of your reach on the table. Making YouTube Shorts from long videos is the single highest-leverage thing a creator can do in 2026 -- one upload can feed a week of vertical content that funnels new subscribers back to the main channel.
I have spent 15 years building software and the last two building AI video tools at Shape. When we built MomentClip, the whole point was to make this exact workflow take minutes instead of an afternoon. Here is how to do it properly -- manually if you want full control, or with AI if you want speed.
[IMAGE_PLACEHOLDER]The Two Ways to Turn a Long Video Into Shorts
There are really only two approaches, and most creators end up using a hybrid. The manual route gives you complete creative control but costs hours per video. The AI route finds the clip-worthy moments for you and hands back ready-to-edit verticals in about 90 seconds.
Method 1: The Manual Workflow
Open your long video in an editor (Premiere, Final Cut, CapCut, or DaVinci Resolve), scrub the timeline, mark the in and out points of a strong moment, crop to a 9:16 frame, reframe so the speaker stays centred, add captions, and export. Repeat for every clip. It works, but watching a 60-minute video just to find five usable moments is the bottleneck.
Method 2: The AI Workflow
An AI clip maker watches the whole video for you, scores every moment on how likely it is to hook a viewer, and returns a ranked list of vertical clips with auto-captions already applied. You review, tweak, and publish. This is where most of the time savings live.
Step-by-Step: From One Upload to Ten Shorts
This is the exact sequence I follow with MomentClip, but it maps onto almost any AI tool.
Step 1: Pick the Right Source Video
Talking-head content converts best -- podcasts, interviews, webinars, tutorials. The more clear spoken ideas per minute, the more Shorts you will get out of it.
Step 2: Upload and Let the AI Analyze
Drop in the file. The AI transcribes the audio, runs natural-language analysis to find quotable moments, and checks visual and audio energy. In a minute or two you get timestamped clip suggestions with a confidence score on each.
Step 3: Reframe to 9:16 and Add Captions
Choose vertical output. Auto-reframing keeps the speaker in frame, and the AI generates captions (85% of Shorts are first watched on mute, so captions are non-negotiable). Brand them with your font and colour.
Step 4: Polish the Hook
The first two seconds decide everything. Trim so the clip opens on the most surprising line, and add a bold text hook on the opening frame.
Step 5: Export, Schedule, and Cross-Post
Export all clips, then schedule them across YouTube Shorts, Reels, and TikTok. One long video should comfortably produce 8-12 pieces -- see going from one video to ten pieces of content for the full multiplication math.
Manual vs. AI: The Honest Comparison
| Factor | Manual Editing | AI Clip Maker |
|---|---|---|
| Time per 60-min video | 4-6 hours | 10-15 minutes |
| Shorts produced | 3-5 | 10-15+ |
| Captions | Manual | Auto-generated |
| Reframing to 9:16 | Manual keyframing | Automatic speaker tracking |
| Finding the best moments | You watch everything | AI scores every second |
Common Mistakes to Avoid
Do not just chop the video into equal chunks -- a Short needs a self-contained idea with a hook and a payoff. Do not skip captions. Do not post all clips at once; space them out. And do not forget a call to action pointing back to the full video.
Frequently Asked Questions
What is the best length for a YouTube Short made from a long video?
30-45 seconds performs best in 2026. Long enough to deliver one complete idea, short enough to hold retention to the end, which is what the Shorts algorithm rewards.
Can I make Shorts from a long video for free?
Yes -- manually in CapCut or DaVinci Resolve at the cost of your time. Most AI clip makers, including MomentClip, also offer a free tier so you can test the workflow before paying.
Does repurposing long videos into Shorts hurt my main channel?
The opposite. Shorts are a discovery engine. A strong clip sends new viewers to your long-form content, where watch time and revenue actually compound.
Related Reading
- New to this? Start with how to repurpose video content without wasting hours.
- Comparing tools first? See the best Opus Clip alternatives.
Turn Your Next Long Video Into a Week of Shorts
At Shape we build AI tools that take the grunt work out of content. MomentClip finds the moments worth clipping and hands them back as vertical, captioned Shorts in minutes. Book a free call with me and I will walk you through it.
-- Marko Balazic, Founder @ Shape