Oshistamp Youtube Video T Chrome extension icon

Oshistamp Youtube Video T

✨ AI-Powered
👥 1K+ users
📦 v2.40.0
💾 231KiB
📅 2026-04-13
View on Chrome Web Store

Chrome will indicate if you already have this installed.

Overview

YouTube Video: Timestamp Creation Assistant Tool

This is a free tool that assists with creating timestamps for YouTube videos.

With intuitive controls, you can easily create and edit timestamps, and for advanced users, quick tasks using keyboard shortcuts are also available.

Additionally, with the AI summary and the per-video saved memo list, you can jump to the corresponding video with a single click, allowing smooth access to previously created timestamps.

It helps make your fan activities more enjoyable and convenient. Please make use of it!

🔧Main Features:

✅️Insert Timestamps
 Click the ⏱️ button while watching a video to insert the current time at the cursor position.

✅️Change Timestamp Format
 You can choose from the following two formats for the timestamps:
 - Short format (e.g., 2:30, 1:45:15)
 - Full format (e.g., 00:02:30, 01:45:15)
 ※ When adjusting by ±1 second using shortcuts(CTRL + SHIFT/ALT + ↑↓), the selected format will be applied.

✅️Jump from Timestamps
 Clicking on a timestamp link will move the video to that time.

✅️Fast Forward / Rewind
 You can choose from preset durations (1s, 5s, 10s, 1min, 5min, 10min) using buttons. Shortcut keys (Ctrl + Shift / Alt + ←→) are also supported. One custom duration can be added as well.

✅️Playback Speed
 Playback speed can be selected from 0.5x, 1x, 1.5x, 2x, or 2.5x using buttons.

✅️AI Summarization
 Leverage Google AI Studio (e.g. Gemini API) to semi‑automatically summarize the content of captioned videos.

 Limitations
 - Video length: under 12 hours
 - Caption file required
 - Breaks required for continuous use (due to Google AI Studio API rate limits)

✅️Video Screenshot
 You can download a screenshot of the video in "PNG format."

✅️Generate Timestamp Links
 Copy a link that starts playback from the current time to your clipboard with one click.

✅️Copy Timestamp
 Copy the created timestamp to the clipboard with one click.

✅️Video playback time and current time display with toggle
 You can view the video playback time in real time on the screen. Clicking the playback time switches the display to the current time. The displayed time may have slight discrepancies.

✅️Video-based Auto-Save Function
 Timestamps are automatically saved to local storage as they are created, so there's no worry about losing data during your work.

 Timestamps are saved independently for each video, allowing you to manage timestamps for multiple videos collectively. Additionally, you can jump to the corresponding video with a single click from the per-video saved memo list, allowing smooth access to previously created timestamps.

✅️Backup and Restore
 To ensure your data is carried over in the following scenarios, we provide a backup feature for timestamp data:
 - Reinstalling the extension
 - Reinstalling Chrome
 - Deleting the user profile (user data directory)
 - Reinstalling the OS or migrating to a different OS

 All timestamp data can be exported and imported in JSON format, enabling easy saving and restoration. Automatic backups to Google Drive are also supported.

✅️Color Mode Feature
 Now supports Dark Mode.

✅️Display Fan Images
 Upload your favorite image to display on the screen, boosting motivation for your fan activities!
 (Supported size: 500px × 70px, formats: JPG, PNG, SVG)

✅️Minimize Feature
 Minimize the screen to the bottom right when not in use.

👉️Keyboard Shortcuts(CTRL + SHIFT or ALT):

・CTRL + SHIFT/ALT + S: Insert timestamp
・CTRL + SHIFT/ALT + K: Toggle play/pause
・CTRL + SHIFT/ALT + →: Skip forward by selected amount
・CTRL + SHIFT/ALT + ←: Skip backward by selected amount
・CTRL + SHIFT/ALT + ↑: Increase selected timestamp by 1s, 10s, 1m, or 10m (multiple values can be selected)
・CTRL + SHIFT/ALT + ↓: Decrease selected timestamp by 1s, 10s, 1m, or 10m (multiple values can be selected)

📝Recent Change Log:

- v2.40.0:
・Added Support for the new YouTube subtitle UI

- v2.39.0:
・Enhanced AI summary features (added topic hierarchy display and an emoji-rich output option)

🔏Privacy and Data Management:

This tool does not collect any user data. All data is saved locally and managed securely.

📌Disclaimer:

The developer is not responsible for any loss or damage caused by the use of this tool. Please use it at your own risk.

Tags

Productivity/tools social-media video productivity/tools

Privacy Practices

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

🔐 Security Analysis

This extension hasn't been security-scanned yet.

Similar Extensions

More in Productivity/tools →

Zotero Connector

8M+ users
Save references to Zotero from your web browser
Productivity/tools
Easy-to-use PDF tools to view, edit, convert, fill, e-sign PDF files, and more in your browser.
Productivity/tools AI
Browsec VPN is a Chrome VPN extension that protects your IP from Internet threats and lets you browse privately for free…
Productivity/tools