How-to · 8 min read
How to turn any long video into TikToks, Reels, and Shorts.
A free, iPhone-only workflow that takes a 1-hour podcast or YouTube video and gives you 8–12 vertical clips ready to post — in about 90 seconds.
The four ingredients every viral short needs
Before any tool, understand what you're actually optimizing for. Every clip that hits has these four things:
- A hook in the first 1.5 seconds. A claim, a question, a contradiction, or a visual pattern-break. Without it, viewers swipe before the algorithm logs an impression.
- 9:16 vertical framing. Horizontal video gets letterboxed and tanks completion rate. Vertical fills the screen and keeps the subject in frame.
- Burned-in captions. 85% of social video is watched silently. No captions = no reach.
- The right length. 21–34s for TikTok, 15–30s for Reels, <35s for Shorts. Long enough to deliver a payoff, short enough to drive completion.
The manual way (CapCut, ~30 min per clip)
- Scrub the long video, find a moment.
- Cut the start/end manually.
- Reposition crop to 9:16, frame-by-frame as the speaker moves.
- Type or auto-generate captions (CapCut auto-caption is mediocre; Apple Speech is better).
- Style captions, export, post.
For one clip, fine. For 5 clips a day, it's a job — and you'll burn out before week two.
The AI way (Clipped, ~30 sec per clip)
Clipped runs the full pipeline on your iPhone. Drop in the source video, the AI finds the moments most likely to hook, reframes them to 9:16 tracking the speaker, burns in captions. Free, no recurring subscription, no upload.
- Save the long video to your iPhone. YouTube offline, a downloader, or save from camera roll.
- Share-sheet into Clipped. Or pick from camera roll inside the app.
- Wait 1–3 minutes. The Apple Neural Engine scores every second for hook strength, audio peaks, faces, and pacing.
- Pick your favorites. 8–12 ranked clips, each already reframed and captioned.
- Tweak and export. Trim, retype any misheard caption, swap caption style. Export to camera roll.
How to clip YouTube videos for TikTok specifically
YouTube uploads to TikTok have two extra concerns: copyright and algorithm bias.
- Copyright: Use only campaign-licensed videos (Whop), your own content, or get explicit permission. Fair-use is defensible but won't protect you from a strike that suspends your account during peak posting hours.
- Algorithm bias: TikTok's detector flags YouTube watermarks. Crop them out via the Clipped reframe step — the AI tracks the subject and excludes the corner where the YouTube logo lives.
Posting playbook per platform
TikTok
- 21–34s sweet spot.
- Hook visible in the first frame (subject + caption).
- Native upload, native sounds. Clean exports — remove tool watermarks once you're scaling.
- 3–5 clips/day; vary hook style.
Instagram Reels
- 15–30s sweet spot.
- Reels rewards visual variety; cut every 2–3s.
- Use trending audio when possible (mute Clipped's audio, layer trending sound).
YouTube Shorts
- <35s for highest viral rate.
- Watch-loop matters — clips that re-engage in the last 2s get re-shown.
- Vertical only — no letterboxed horizontal.
FAQ
How long should a short clip be in 2026?
TikTok rewards 21–34 seconds for completion-rate-driven distribution. Reels favors 15–30s. YouTube Shorts caps at 60s and the algorithm rewards full-watch — but clips under 35s have the highest viral hit rate. When in doubt, target 25–30s.
What's the best free way to clip a long video for TikTok on iPhone?
Clipped runs the full pipeline — moment detection, vertical reframe, captions — on-device on iPhone, free, with no recurring subscription. CapCut works for manual clipping but doesn't auto-detect viral moments. Opus Clip and Submagic do, but require uploading and a $16–$19/mo recurring subscription. Clipped exports include a small Clipped watermark by default; one optional one-time in-app purchase removes it permanently.
How do I turn a 1-hour YouTube video into shorts?
Save the video to your iPhone (YouTube Premium offline, or a downloader app), share-sheet into Clipped, the AI returns 8–12 ranked clips reframed to 9:16 with captions. Trim if needed, export, post natively to each platform.
Do I need permission to clip someone's YouTube video?
For commercial reuse, yes. For commentary, criticism, or education, fair-use generally applies in the US — but YouTube's content-ID system can still demonetize or strike. The cleanest path is paid clipping campaigns (Whop, Vyro) where the rights are pre-granted, or DM the creator directly.