Harmonize Project lets you sync HDMI video with Philips Hue lights using a Raspberry Pi!

Curate, visualize, annotate, and share your behavioral ephys data using Python

Dubbing and post-synchronization tool

a Python toolbox for reproducible analysis and visualization of NeuroPhysiological data.

:video_camera: A jQuery plugin to synchronize slide images with videos in JWPlayer 7, HTML5 or YouTube Player

Automatic alignment of surgical videos using kinematic data

Real-time P2P video streaming and syncing platform with your local files ( + chat).

A node.js server that lets you have watch parties with minimal UI for the client, which also enables watch parties for Minecraft's WebDisplays mod or any mod with browser screens; supporting local videos, videos with licensed codecs(through BSL-S²), embeds from various platforms, and more with extensive controls and an admin panel.

Kokoro is a real-time web app that lets you watch videos and chat with friends.

🎬 Real-time video sync API for watching videos together on streaming sites and custom platforms.

🧩 Browser extension for Sync-Mate. Enables synchronized video watching across platforms like Rezka, YouTube, and your own site, with real-time controls for all participants.

Browser extension for watching videos in sync with multiple users on youtube.

Tempo video generator

Real-time video synchronization platform for YouTube watch parties. Built with React, NestJS, Socket.IO WebSockets, PostgreSQL & Prisma ORM. Features <500ms sync latency, multi-user rooms, JWT auth, and participant tracking. Watch videos together with friends in perfect sync.

A timer for playing videos automatically.

Lightpen adapter for Commodore 64 with flat-tv

Watch Movies Together. As If You’re Right There. Stop battling laggy screenshares. NearWatch syncs your video perfectly, so you can share every laugh, scream, and scene with your friends and partner in real-time.

HID keyboard with synced external actuation

A web-based video player with synchronized playback, HLS support, theme toggling, and local video file support. Watch videos together with others in real-time by joining the same room. Note: For local videos, all participants must have a copy of the same file. Built with Plyr, HLS.js, and Video Together for seamless, synced streaming across devices

🎬 A Chrome extension that lets you watch videos with friends in perfect sync — real-time playback control, built-in chat, and universal site support.