Youtube Watchmarker V3 Re

Starting a video only to realize you’ve already seen it is annoying. YouTube Watchmarker runs in the background to prevent this by tracking what you've seen and visibly marking those videos on the site.

Features:

🎯 Tracking
• Track browser navigation in real-time
• Sync your browser history
• Sync your YouTube watch history

⚙️ Configurable Visual Settings
• Fade out thumbnails for videos you have already watched
• Convert watched thumbnails to grayscale
• Add a badge to the thumbnail showing the exact date you viewed it
• Hide the built-in red progress bar on videos you have completed
• Display full progress bars on videos you have completed

💾 Data & Privacy:
• All data is stored locally on the device so your history remains private
• Synchronize your history automatically every hour
• Support for exporting/importing your watched videos database
• Includes a built-in search tool to quickly find previously watched videos
• Manually remove specific videos from your YouTube/Browser history

Changelog:
v1.0.6:
• improved youtube synchronization
• fixed video deletion from youtube history

v1.0.7:
• fixed some issues with video marks

v1.0.8:
• added a "Quick Sync" option that will only sync the last 1000 videos watched

v1.0.9:
• added support for youtube's latest update (main page and recommendations)

v1.0.10:
• improved support for the latest youtube layout

v1.0.11:
• added a popup to make it easier and faster to sync your watched history (just click the extension icon)
• added a new visual option to mark watched videos (red progress bar)

A refreshed version of the original Watchmarker for YouTube extension, now working with Manifest V3. Credit goes to the original author.