A 721 minutes video on YouTube
It is over the 12 hours SkedCast checks for YouTube, so trim it before scheduling, or post a cut-down version and link to the full one.
YouTube post preview
This YouTube post preview shows how your caption and image will actually render in YouTube’s own feed, including the point where YouTube cuts the caption off behind "Show more" and a reader has to tap to read the rest. It is the exact same preview engine as our general social media post preview tool — this page just defaults to YouTube and answers YouTube-specific questions below it. Third-party measurement (YouTube does not publish this), checked September 2026.
Platform
YouTube preview
Y
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We just shipped a big update to how bulk imports work. Here's a quick look at what changed and why it makes scheduling a month of content faster than before. Show more
How do you use the YouTube post preview?
- Paste your YouTube caption. Type or paste your draft YouTube caption into the box; nothing you type is uploaded anywhere.
- Add an image URL (optional). Paste a public image URL to see it in the mockup frame, or leave it blank to preview the caption alone.
- Confirm YouTube is selected. This page opens with YouTube selected; switch platforms in the tabs above the preview to compare.
- Read the truncation point. The preview greys out the part of the caption that falls past YouTube’s real "more" cutoff, so you can see what a scrolling reader sees before they tap through.
- Move your hook earlier if it is cut off. If your key message or call to action falls in the greyed-out part, move it earlier in the caption so it survives the cutoff.
What are the YouTube rules to know?
YouTube crops media to 16:9 in the feed and takes video up to 12 hours. The limits SkedCast’s composer checks for YouTube before a post goes out, read from the same rules table the composer uses.
| Feed crop | 16:9 in the feed preview |
|---|---|
| Images | Not published by SkedCast to this platform |
| Video | up to 1 per post · MP4, MOV, WEBM, X-MSVIDEO · up to 12 hours · max 262,144 MB · 16:9 or 9:16 recommended |
| Mixing photos and video in one post | Not allowed: one media type per post |
| Alt text | Not supported by the platform |
| Separate title field | Yes: the title is shown apart from the description |
| Text limit | 5,000 characters |
| How length is counted | As you see it: one emoji or accented letter counts as one character |
Good to know
- YouTube cannot post text without a video — every post requires exactly one video.
- YouTube does not support image, photo, or carousel posts via the API.
- YouTube does not support GIF posts.
- YouTube does not support document/PDF posts.
- YouTube does not support polls, threads, stories, or link posts via the publishing API.
What does it look like in practice?
YouTube’s real truncation point
YouTube’s watch-page description shows roughly the first 157 characters before "Show more" appears. The watch-page description shows roughly the first 157 characters (about 3 lines) before "Show more". A Shorts description is displayed differently and is not modeled by this tool — only the standard watch-page description is.
A caption that survives the cutoff
A 320-character caption with its hook in the first 80 characters reads completely for a scrolling YouTube viewer even though the rest is hidden behind "Show more".
YouTube post preview FAQ
- Where does YouTube cut off a caption?
- YouTube’s watch-page description shows roughly the first 157 characters before "Show more" appears. The watch-page description shows roughly the first 157 characters (about 3 lines) before "Show more". A Shorts description is displayed differently and is not modeled by this tool — only the standard watch-page description is.
- What video can I post to YouTube?
- SkedCast publishes MP4, MOV, WEBM, X-MSVIDEO video to YouTube, up to 12 hours and 262,144 MB.
- Can one YouTube post mix photos and video?
- No. A YouTube post carries one media type, so split photos and video into separate posts.
- Does YouTube support alt text?
- YouTube does not accept alt text through its publishing API, so describe the image in the post text if it matters.
- Is this preview built specifically for YouTube?
- No — it is the same multi-platform post-preview tool as our general preview, arranged so YouTube’s default view and questions are easy to find from a YouTube-specific search.
- Does the preview upload or store my caption or image?
- No, the preview renders entirely in your browser from the text and image URL you provide; nothing is uploaded, saved, or sent to a server.
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