Social PublishingBeginner

How to Turn One YouTube Video Into TikTok, Reels and Shorts Clips

Take a single long-form YouTube video and cut it into vertical short clips ready for TikTok, Instagram Reels and YouTube Shorts.

9 minBeginner

A ten minute YouTube video usually has three or four moments that stand on their own. Instead of filming new content for every short-form platform, you can slice those moments out, crop them to vertical, add captions, and post them everywhere. This guide walks through doing that with free or low-cost tools so one recording feeds TikTok, Reels and Shorts.

The source video file (or its YouTube URL)
A free auto-clipping tool such as Opus Clip, or a manual editor like CapCut
A vertical 9:16 canvas (1080x1920) for the export
A list of 3 to 4 standalone moments worth clipping

Step 1: Find the standalone moments

Watch the video once and note timestamps where you make a single clear point in under 60 seconds. A good clip answers one question, tells one story, or shows one result. Write down the start and end time of each. Avoid clips that need context from earlier in the video, because a scrolling viewer has none.

Step 2: Auto-clip with Opus Clip (optional)

If you want a fast first pass, paste your YouTube URL into Opus Clip. It transcribes the video, scores segments by likely engagement, and returns ready-made vertical clips with captions. Treat its picks as suggestions: keep the ones that match your timestamps and discard the rest.

Opus Clip - import

Import video

URL: https://youtube.com/watch?v=XXXXXXXXXXX

Clip length: ( ) <30s (x) 30-60s ( ) 60-90s

Aspect ratio: 9:16 vertical

[ Get clips ]

Paste the YouTube link, pick a clip length, then generate.

Step 3: Crop and caption manually in CapCut

For full control, drop your trimmed clip into CapCut, set the canvas to 9:16, then reframe so the speaker stays centered. Use Auto Captions to generate burned-in subtitles, since most people watch muted. Keep text in the middle third of the frame so platform UI buttons do not cover it.

CapCut - editor

Canvas: 1080 x 1920 (9:16)

[ Clip 1 ]----[ transition ]----[ Clip 1b ]

Captions: Auto (burned in) Font: Bold 64px

Safe zone: keep text inside center third

9:16 canvas with the subject reframed and captions enabled.

Step 4: Export one master vertical file

Export each clip once at 1080x1920, H.264, 30fps. You can upload the same file to all three platforms. Use FFmpeg if you need to batch-convert several clips to identical settings.

zsh - clips

Normalize every clip to vertical 1080x1920

$for f in *.mp4; do ffmpeg -i "$f" -vf "scale=-2:1920,crop=1080:1920" -r 30 -c:a aac "vert_$f"; done

vert_clip1.mp4 vert_clip2.mp4 vert_clip3.mp4

Change the hook per platform

The video can be identical, but rewrite the first caption and the on-screen hook text for each platform's audience. A TikTok hook can be blunter; a Shorts hook should lean toward the search phrase people type on YouTube.

Result: from one ten minute video you now have three vertical clips, each captioned and reframed, posted across TikTok, Reels and Shorts in a single afternoon instead of three separate shoots.