What does Chapter & Timestamp Builder do?
Tubelexity helps creators build a formatted list of YouTube chapters from a local video or a manually entered duration. Add a chapter at the current playhead, edit titles and times, reorder entries and resolve validation issues before copying or exporting a TXT file. It does not download or scrape YouTube videos.
How to use Chapter & Timestamp Builder
- 1Load a local video or enter its duration manually.
- 2Add chapters at the current playhead and write specific titles.
- 3Edit or reorder timestamps until validation passes.
- 4Copy the formatted chapters or export a TXT file.
Supported inputs and outputs
Inputs
MP4, WebM, MOV, Manual duration
Outputs
Formatted chapter text, TXT file
Practical uses
- Chaptering a tutorial
- Marking podcast topics
- Formatting a video description
- Planning lesson sections
Browser and media limitations
- The first chapter must begin at 00:00.
- YouTube may apply additional chapter eligibility rules.
- Local video playback depends on browser codec support.
- The tool does not inspect a YouTube URL.
How local processing works
Local video playback uses the browser's native media APIs. The video and chapter text remain in the browser and are not sent to Tubelexity.
Frequently asked questions
Can I generate YouTube chapter timestamps?
Yes. Add chapter markers from a local video or manual duration, then copy the validated YouTube-ready text.
Must the first chapter start at 00:00?
Yes. The builder flags a chapter list whose first timestamp does not begin at 00:00.
Which timestamp formats are supported?
Both MM:SS and HH:MM:SS are supported.
Does Tubelexity download YouTube videos?
No. Use a local file or enter the duration manually.