Y Combinator

Y Combinator · Launch Video Breakdown: Hook, Pacing & Motion Design

Every manufactured part needs a 2D drawing and mechanical engineers have to spend hours making them. REV1 does it in minutes. Congrats on the launch @Alex_Rivero_S & Louis! https://ycombinator.com/…

Tech & SaaSLaunchFebruary 3, 2026@ycombinator
0:00 · The Hook · The Engineering Bottleneck: From 3D to 2D
0:00 / 0:00

Scene-by-scene timeline & spoken transcript

  1. The Hook

    The Engineering Bottleneck: From 3D to 2D

    “Engineers build things. And every manufactured part needs a 2D drawing. And mechanical engineers have to spend hours making them. They have to add dimensions, tolerances, and manufacturing notes. And this is a huge bottleneck for every engineering team. But what if one tool did it all for you?”

    On screen
    engineers build things everyday 350 unique parts Alex Rivero CEO, REV1 dimensions, ASME Y14.5-2018 Dimensioning and Tolerancing Engineering Product Definition and Related Documentation Practices Lou Liu CTO, REV1 one does REV1
    Camera
    Dynamic cuts between close-ups of the founder, animated text, and product examples. Camera pans and zooms to emphasize key elements.
    Motion
    Fast-paced cuts, text reveals, object animation, and a quick zoom into the product UI. A prominent riser at 0:02 followed by a sub-bass drop/impact at 0:03, and another riser at 0:16 leading into a sub-bass drop/impact at 0:17.
  2. Problem Agitation

    The Tedious Reality of Manual Drafting

    “Engineers spend hours making these drawings. They have to add dimensions, tolerances, and manufacturing notes. This is a huge bottleneck for every engineering team. But what if one tool did it all for you? REV1 automates the creation of 2D drawings from 3D CAD models. It automatically adds all the necessary dimensions, tolerances, and manufacturing notes. It also checks for errors and suggests improvements. This allows engineers to focus on problem-solving rather than drafting.”

    On screen
    main_body_step Synced 3D Split 2D LL Louis Review 1 Context 2 Datums 3 Review 4/44 0.05 A 0.03 A 0.1 A 0.05 A 0.1 A 0.45 A B C 0.2 A B C 0.3 A B C 0.3 A B C 0.1 A B C 0.3 A B C 4X Ø 3.50 ±0.1 THRU Ø 5.80 ±0.1 x25.00 ±0.2 M10x1.5 - 6H THRU Accept All (40) Why this annotation? 4X counterbore clearance holes (Ø3.5mm) for M3 fasteners require position control. MMC modifier applied for bonus tolerance on clearance holes. 0.25mm provides adequate assembly clearance. ANSI C-1: 1-1 mm REV1
    Camera
    Close-up on the software UI, demonstrating the manual process and then the automated solution. Camera zooms into specific UI elements.
    Motion
    Screen capture with UI highlights, animated annotations appearing on the 2D drawing, and a subtle camera pan across the digital workspace. A distinct 'click' sound effect is heard at 0:50 and 0:51.
  3. Product Reveal

    REV1: The Automated Drafting Solution

    “REV1 automates the creation of 2D drawings from 3D CAD models. It automatically adds all the necessary dimensions, tolerances, and manufacturing notes. It also checks for errors and suggests improvements. This allows engineers to focus on problem-solving rather than drafting. We're excited to launch REV1 and help engineers build things faster.”

    On screen
    changes the REV1
    Camera
    Medium shot of the founders, followed by a full-screen display of the REV1 logo. Camera remains static on the founders, then cuts to a static logo.
    Motion
    Text overlays animating in and out, followed by a clean logo reveal. The music builds in intensity with a more pronounced electronic beat and synth melodies.
  4. Call to Action

    Build Faster with REV1

    “(No spoken dialogue — The music builds in intensity with a more pronounced electronic beat and synth melodies, creating a sense of urgency and excitement.)”

    On screen
    (No on-screen text)
    Camera
    Rapid cuts between various product UI shots, showcasing different features and benefits. Dynamic camera movements, including quick pans and zooms, highlight the software's capabilities.
    Motion
    Fast-paced montage of UI interactions, animated data visualizations, and quick transitions between different software views. The electronic score reaches its peak intensity.

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