Voted by ₥AN$A, Air Planes, kaleb, Khalil, rookepoole, Smiley “MakeShif”, Wil

Walking through it like a live demo: 1. **Join** — you land on a gate screen, type a name, and either generate a random room code or paste one a friend sent you. Hit "Enter the room." 2. **Share** — the room code lives right in the URL (`#room=ABC123`), so "Copy invite link" gives you something you can just paste in a group chat. Whoever opens it lands in the same room. 3. **Load something** — anyone pastes a direct video or audio link into the box at the bottom and hits "Play for everyone." It detects whether it's audio or video and loads it for the whole room simultaneously. 4. **Stay in sync** — from there, whoever plays, pauses, or drags the seek bar, everyone else's player jumps to match. It corrects for network lag using timestamps, so people don't slowly drift out of sync over a long video. 5. **React together** — tapping an emoji sends a burst that floats up over the video for everyone in the room at the same instant, so it feels like reacting in the same room instead of typing into a void. 6. **Chat** — a normal live chat panel alongside the player for running commentary. 7. **Pin a moment** — instead of just chatting past a great scene, "Pin this moment" drops a marker on the seek bar tied to that exact timestamp, with a note. It shows up in the Moments tab too, and anyone can click it later to jump straight back to that point — so the best bits of the watch don't get lost in scrollback. Under the hood, there's no backend server: browsers connect directly to a public real-time relay (PartyKit) keyed by the room code, and broadcast small JSON messages for playback state, chat, reactions, and moments. That's also why it can ship as a plain static file / Hugging Face static Space with nothing to configure.

Models

Gemini/Claude

Cost

I don't have access to the actual token counts for this conversation, so I can't give you an exact number — but here's a reasonable estimate based on what got generated: - The main build (single HTML/CSS/JS file, ~740 lines) plus the design-planning pass and the HF Space packaging round out to roughly **40–70k tokens** across the conversation. - Using Claude Sonnet 5 API pricing, that's very roughly **$0.30–$0.60**, though actual cost depends on your specific plan/interface and whether you're on API billing or a subscription (in which case there's no per-token charge to report). If you need a precise figure for the submission, the accurate way to get it is checking your Anthropic Console usage dashboard for this session rather than my estimate — happy to help interpret it if you pull those numbers.