Content and format
Video specs for Shorts, VK Clips, Reels, TikTok and Rutube
| Platform | Format | Short video length |
|---|---|---|
| YouTube Shorts | 9:16, MP4 | up to 3 minutes |
| Instagram Reels* | 9:16, MP4 | up to 3 minutes |
| TikTok | 9:16, MP4 | up to 10 minutes on upload |
| VK Clips and VK Video | 9:16 or 16:9, MP4 | clips are short; videos have no hard limit |
| Rutube | 9:16 or 16:9, MP4 | no hard limit for regular videos |
| Telegram | any, MP4 | size limit: 50 MB from a bot |
Platforms change limits; checked October 2026. Autoposter itself accepts files up to 100 MB.
Keeping quality
- Shoot and export at 1080×1920; don't upscale 720p.
- 8–12 Mbps for 1080p: good quality, sensible size.
- Keep safe margins top and bottom: platform UI covers about 15% of the frame.
- Burn in subtitles: many people watch muted.
More guides
- When to post: finding your best timeWhy there is no universal best time and how to find yours from your channel stats with the best-time map.
- How to write captions for each networkHow a YouTube caption differs from VK, Telegram and Dzen captions, with examples and rules, plus how the AI caption helps.
- Getting started: your first scheduled post in five minutesSign up, connect your first platform and schedule your first post in Autoposter, step by step.
- How to post one video to every network at onceCross-post one video to YouTube Shorts, VK, Rutube, Telegram, Dzen and more in a single post, with a caption per network.