ReplayGlows extension
Remove the channels, Shorts and comments you never want to see from every YouTube page. Set a shared listening speed for HTML5 video and audio, and pin a tab to its own pace when a passage needs more attention. On YouTube, keep timestamped notes, sort your playlists and subscriptions, and turn moments into study cards.
Publication on the Chrome Web Store is in progress: there is no public download link yet. Filters, notes and player tools need no account; study cards require a ReplayGlows account.
1.50×
Choose a base speed from 0.25× to 4×. Supported unpinned tabs follow it, including newly discovered media. The popup offers a slider, 0.5× / 1× / 1.5× / 2× presets and a favorite speed.
Pin a tab inside ReplayGlows to keep its own rate while the others follow your base speed. Unpin it to rejoin the current shared speed. This is separate from pinning a tab in Chrome.
On YouTube, keep timestamped bookmarks and notes. Choose two bookmarks on the current video as the beginning and end of a temporary A–B loop, or mark the positions while watching.
Configure playback shortcuts alongside bookmark shortcuts. Hold the boost shortcut to accelerate temporarily, then release it to return to your pace. Text fields are protected from playback shortcuts.
New · no account needed
Block a channel, a video, a word or a comment author once, and it disappears from home, search, suggestions, end screens and comments. Filtering happens in your browser on what YouTube sends, before the page shows it. Your history and playlists are never filtered.
“Block the channel” and “Block this video” appear in the ⋮ menu of every video, and “Hide comments from…” in comment menus. A confirmation lets you undo in one click.
List channels by name, @handle, id or link, words to hide from titles (whole words, case and accents ignored, regular expressions accepted) and single videos, all in the options.
Hide Shorts (a Short you open anyway plays in the regular player), YouTube’s generated mixes, movies and the Explore section, videos that are too short or too long, and the ones you have already watched.
Hide comments by author or by word. Blocked channels disappear from comments too, and “Video paused. Continue watching?” can stop interrupting you.
These tools work without a ReplayGlows account. Playlist actions change your YouTube playlists, just as YouTube does. Most of them can be turned off in the options.
Seek buttons jump back or forward 3 s or 15 s; Ctrl halves the step, Shift doubles it and Ctrl+Shift multiplies it by five. Videos resume where you stopped, except for links with a timestamp and nearly finished videos. Big screen mode fills the browser window, and a mini player keeps the video visible while you scroll to the comments or notes. Subtitle size, position and background can be adjusted in the options.
On playlist pages, Multi-select lets you tick several videos (Shift for a range, Ctrl+A for all), then copy or move them to another playlist or to Watch later, or remove them after a confirmation. Filter by title and remove duplicates, keeping the first copy of each video. A Watch later button also appears on thumbnails; changes reach YouTube only once it confirms.
On your YouTube channels page, open the full list of your subscriptions, tick the channels to drop (or select all) and unsubscribe in one run after a confirmation, with no daily limit. Export the list as CSV first to keep a copy.
Requires a ReplayGlows account
Turn a moment of a video into a question and answer anchored to its passage. Review the cards that are due with spaced repetition, and replay the exact passage before you grade your recall. Study cards are stored in your ReplayGlows account, not in the extension.
Use the Card button in the ReplayGlows bar under a YouTube player, or the Watch page. The card starts at the current moment, and its passage is set around it. You write the question and the answer.
With your own OpenRouter or Cerebras key, AI can suggest a question and answer from the transcript around the moment. Nothing is saved until you confirm it. AI drafts are part of the Pro plan; manual cards do not need it.
The Review page brings back your due cards. Reveal the answer, replay the exact passage or open it in Watch, then grade the card Again, Hard, Good or Easy. Again brings it back later in the same session.
Free plan: up to 50 cards, with 10 per video. See the plans
The extension works on browser pages without an app sign-in. Its bookmarks, watch progress and settings stay local to the extension. Study cards are the exception: they require a ReplayGlows account and are stored there. The ReplayGlows web app has its own library; automatic synchronization between the two is not available.
YouTube bookmarks, notes, watch progress and extension settings are stored in the browser profile where ReplayGlows is installed. The extension does not upload or automatically sync them to your ReplayGlows account. Clearing browsing history or cache normally does not erase extension storage. Uninstalling the extension, deleting or losing the browser profile, or losing the device can remove it. Export a JSON backup regularly and keep the file somewhere safe; it covers bookmarks and watch progress, not extension settings.
The web app uses a separate ReplayGlows account and cloud library, available across signed-in devices. Study cards are saved there and are not kept in extension storage. Extension bookmarks and notes do not appear in the app automatically, and app data does not automatically populate the extension. Extension bookmarks and notes still have no cloud backup or account-based recovery.
Playback controls apply to accessible HTML5 video and audio on HTTP and HTTPS pages. Notes, YouTube player tools and playlist actions are YouTube-specific. Browser-protected pages, file URLs and inaccessible players are not supported; some websites enforce their own playback rate.
Follow a worked example using a difficult YouTube passage, two bookmarks and a slower pinned tab.
Try a review workflow →