
Built a free extension that syncs a reaction video with your Netflix/Crunchyroll/etc. tab so they never drift apart
Kept trying to watch reaction videos next to the actual episode and the two would drift apart almost immediately — constant pausing and scrubbing both tabs to line them back up. Got annoyed enough to build a fix.
It's a Chrome extension (MV3) + a small web app. You load the reaction video, open your show in Netflix/Crunchyroll/whatever, set one or two sync points, and it just... drives the show tab's play/pause/seek to stay locked to the reaction video from then on. It's not doing anything fancy under the hood, just finding the <video>element on the streaming tab and controlling it directly — no capture, no re-hosting, nothing sketchy with the DRM.
Covers Netflix, Disney+, Max, Prime, Crunchyroll, Hulu, Apple TV+, Peacock, plus local video files if that's your setup.
Its totally free, works without an account — signing in just saves your sync points so you're not resetting them every time and having to paste URL.
Website: https://watch-alongs.com Chrome Extension: https://chromewebstore.google.com/detail/watch-along/dpidfogjiemjckjfgoohjopkamnannec
Still rough in places, so if you try it and something breaks I'd genuinely like to hear about it!