Launch HN: Cardboard (YC W26) – Agentic video editor

Cardboard dropped on Hacker News promising “first cut to final cut, no grind,” and the crowd practically tossed confetti. The pitch: AI speeds through the boring bits—captions, pacing, music, voiceovers—while you keep creative control. That last part mattered; folks loved the idea of superpowers without surrendering the steering wheel.

The strongest vibe? Relief. As calebm put it, video tools can be a “big learning curve,” and the community’s nodding hard. One user got sentimental: after making videos for a long-distance loved one using CapCut, they said this is exactly the “I wish it did that” tool. Cue the heart emojis. Meanwhile, danieltk76 casually flexed: their team already uses Cardboard at work and calls it “incredible,” shouting out the founders for being hands-on. That real-world stamp lit up the thread like a standing ovation.

But because it’s HN, the polite drama arrived: who is this really for? rd asked where the money is—shorts, YouTubers, or someday even studios? The onboarding also got applause—“nice demo experience,” “great website”—and someone even dropped a “adding you on LinkedIn,” which became the unofficial meme of the launch. Between the hype and the hard questions, the mood is: this could make editing fast and fun, but the market lane (TikTok clips or Hollywood dreams?) is the cliffhanger worth refreshing for.