Tell me about the limits and restrictions for images and videos

2021-04-06 06:31:37 UTC 2026-07-14 10:31:50 UTC

Images

Limits, Maximums

Image Registration

Total number of images per group No limit
Total image storage per group No limit
File size per cover or step image Up to 20 MB
File size per icon image Up to 5 MB
File extensions png, jpg, HEIC ※

※ HEIC format images can only be registered via the iOS app.

Videos

Limits, Maximums

All Apps (Common)

Basic Information Total number of videos per group Up to 1,000 videos ※1
Total video storage per group No limit
File size per cover or step video Up to 4 GB
Number of markings and subtitles per video Please refer to the following for details.
▼How many markings and subtitles can be added per video?
https://help.teachme.jp/hc/en-us/articles/54687781960601

Web Browser Version

Duration and file size per cover or step video Registration only 20 minutes
When editing video 20 minutes
When trimming video (source) Up to 2 GB
When trimming video (output) 20 minutes
Supported file extensions ※3, 4 Registration mp4, mov, m4v, qt, avi
Video trimming mp4, mov, m4v, qt

Teachme AI

Duration and file size per video used for semi-automatic generation
Registration 45 minutes ※2
Registration Up to 2 GB
Supported file extensions
※3, 4, 5
Registration mp4, mov, m4v, qt

Mobile App

Duration per cover or step video Registration only 10 minutes
When editing video 10 minutes
When trimming video (source) No limit ※5
When trimming video (output) 10 minutes
Upload to Media Library / Generate from Video with AI Up to 2 GB
Supported file extensions ※3, 4 Registration, video trimming (iOS app) mp4, mov, m4v
Registration, video trimming (Android app) mp4, 3gp
Upload to Media Library / Generate from Video with AI mp4, mov, m4v

Notes

※1 Videos registered in archived manuals or clipboards are also counted.
The limit can be expanded in increments of 1,000 videos by adding the paid option "Movie Limit Increase."
Related: The video registration limit has been reached. What should I do?
https://help.teachme.jp/hc/en-us/articles/4402479700249
If you have subscribed to the Teachme AI options "Creation Pro," "Utilization Pro," or "Premium," unlimited uploads are available.
Related: [Overview] Teachme AI
https://help.teachme.jp/hc/en-us/articles/29512820683801

※2 If there is a large amount of dialogue or actions, an error may occur even if the video meets this limit.
Please remove unnecessary sections or split the video into segments of approximately 10–20 minutes.

※3 Even if the file extension matches, audio-only files that do not contain any visual content (images, video, or animation) cannot be registered.

※4 Videos with the "AV1" codec cannot be registered on any device.

  • Even if the limits are met, videos may not be uploadable depending on how they were created or edited.
    If you are preparing a large number of, or paid, images or videos, please prepare a sample video in advance and verify that it can be registered and edited as intended.
  • Depending on the length and size of the video and your usage environment, processing long videos may take considerable time.
    If processing does not complete in a reasonable time, consider canceling the process, shortening the original video, and re-registering it.

※5 When using semi-automatic generation from a video already registered in a cover or step, it can be used regardless of the original video's file extension.

▼Supported Devices/OS and Recommended Environment List
https://help.teachme.jp/hc/en-us/articles/14572215297305


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