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YouTube: readable description box

Enlarges the video description text, loosens line spacing and adds a backdrop for comfortable reading.

Code to copy

/* Make the video description box larger and easier to read */
ytd-text-inline-expander#description-inline-expander,
#description.ytd-watch-metadata yt-formatted-string {
  font-size: 1.5rem !important;
  line-height: 1.7 !important;
}
#description.ytd-watch-metadata {
  background: rgba(128,128,128,0.06) !important;
  padding: 12px !important;
  border-radius: 12px !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.