Key takeaways
- Pick clips that make one point without context, then reframe them to vertical 9:16.
- YouTube’s “Edit into a Short” takes up to 60 seconds of your own public long-form video; music from YouTube’s Audio Library cannot be used on Shorts made that way.
- A Short can be up to three minutes; Buffer reports Reels of 90 seconds or less tend to perform best for reach and engagement.
- SkedCast does not edit or cut video: cut in an editor, then schedule the finished clips to Instagram, YouTube and TikTok from one calendar.
How do you repurpose a long video into Shorts and Reels?
The work is choosing and editing; the publishing is the easy part. A repeatable order:
| Step | What you do | Where it happens |
|---|---|---|
| 1. Choose segments | Mark the moments that make one point on their own, with a hook in the first seconds | Your player or transcript |
| 2. Cut and reframe | Trim each segment and reframe to vertical 9:16, keeping the subject centred | A video editor, or YouTube’s Edit into a Short |
| 3. Add captions and a hook | Burn in captions and a title line for people watching muted | Your editor |
| 4. Export clean | Export from your editor with no other app’s logo | Your editor |
| 5. Write per-platform captions | One short native caption per platform | The scheduler composer |
| 6. Schedule across a week | Stagger clips over days and platforms | SkedCast calendar or CSV import |
How long should each clip be?
The platforms’ ceilings are far above what performs. A YouTube Short can be up to three minutes, but YouTube’s own “Edit into a Short” takes up to 60 seconds of a long-form video. Buffer’s Instagram Reels guide reports that shorter videos — 90 seconds or less — tend to perform best for reach and engagement, and that long uploads are not prioritised by the Reels algorithm or featured in the Reels tab. SkedCast’s composer accepts more (up to 15 minutes on Instagram, 10 on TikTok), but those are ceilings, not targets.
How does YouTube’s own Edit into a Short work?
On a public long-form video you uploaded, open its watch page in the YouTube app, tap Remix, then Edit into a Short, and select up to 60 seconds of the video before adding text or filters. Only the original creator can do this to their own video, private and unlisted videos and videos with third-party copyright claims cannot be used, and music from the Audio Library is not available on Shorts made this way. The resulting Short links back to the original video.
How do you schedule a batch of clips with SkedCast?
Upload the finished clips to the media library — folders can be uploaded in bulk — then either build each post in the composer or list them in a CSV, one row per clip, with the caption, the platforms (for example instagram|youtube|tiktok), the video URL, an optional cover and the time. The importer validates every row and shows a preview where you fix problems before committing. For the per-platform fields (TikTok’s privacy level, YouTube’s title) see how to post one video to Reels, Shorts and TikTok at once.
How do you spread the clips out?
Stagger clips across the week and across platforms so no single day carries the whole batch, and keep to a cadence you can sustain: Buffer’s frequency guide suggests 3–5 Instagram posts a week, 2–5 TikToks and 1–3 Shorts. The best days and times differ by platform, and the studies conflict on TikTok, so use the Instagram, YouTube and TikTok posting-schedule guides as a starting point and test.
Sources
FAQ
- How do I turn a long YouTube video into Shorts?
- Use “Edit into a Short” on a public video you uploaded: it lets you select up to 60 seconds and add text or filters, and the Short links back to the original. Or cut clips in any editor, export a vertical 9:16 file, and upload it as a Short.
- How many clips can I get from one long video?
- It depends on how many self-contained points the video makes; we do not give a formula. Choose segments that work without the surrounding context.
- Can SkedCast cut my video into clips?
- No. SkedCast schedules and publishes finished videos; cut and reframe them in a video editor or YouTube’s Edit into a Short first.
- What is the best length for a Reel or Short made from a longer video?
- Buffer reports Reels of 90 seconds or less tend to perform best for reach and engagement, and YouTube’s own Edit into a Short takes up to 60 seconds. Shorts can run up to three minutes.
- Should the same clip go to TikTok, Reels and Shorts?
- It can, from one clean file, with a caption native to each platform; stagger the times rather than posting all three in the same minute.