Fix for Missing Video Thumbnails in Nautilus

To resolve the issue of missing video thumbnails in Nautilus on Ubuntu, follow these steps to install the necessary plugins and clear the thumbnail cache.

Steps

1. Install Ubuntu Restricted Extras
   This package includes essential codecs and tools for media playback and compatibility.

   sudo apt install ubuntu-restricted-extras
   

2. Install Required GStreamer Plugins
   These plugins add further support for video codecs and thumbnail generation.

   sudo apt install gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav
   

3. Clear Thumbnail Cache
   Removing old cached thumbnails can fix display issues caused by corrupted or outdated files.

   rm -rf ~/.cache/thumbnails/*
   

After completing these steps, video thumbnails should display correctly in Nautilus.