Rivet — Youtube Speed Rea

Rivet overlays YouTube captions on the video as a single-word, fixed-position display, using the rapid serial visual presentation (RSVP) reading technique. Each word's optimal-recognition-point letter is tinted red so your eyes stay anchored at one spot while the words flow through it.

Inspired by Spritz® and other RSVP speed-reading tools, brought to YouTube as a free, privacy-respecting browser extension.

How to use:
• Hover the YouTube player. A "Rivet" badge appears in the top-right corner.
• Click it. The overlay starts reading along with the video.
• Drag the overlay to reposition; release it back at the home position to return to dynamic auto-anchor.
• Hover for size (− / +) and CC controls.
• Click × to dismiss.

Features:
• Works on any YouTube video with captions (auto-generated or human).
• Smart caption detection: pre-written captions are detected automatically, and Rivet silently switches to YouTube's auto-generated track (when available) for smoother word-by-word pacing. One-click revert from a small info badge.
• Toggles native captions on/off independently.
• Resizable; remembers your size, position, and on/off state per device.
• Suppressed automatically on YouTube Shorts and non-watch pages.
• Zero data collection. Nothing leaves your device. Settings live in your browser's localStorage on youtube.com.

From Simmer Industries. Source + privacy policy at rivet.simmerindustries.com.