ScribeShot
Offline YouTube Summarizer for Mac
Summarize YouTube videos, extract timestamped chapters, capture screenshots, and generate Markdown notes completely offline on your Mac. ScribeShot runs built-in Gemma 4 models directly on Apple Silicon with zero cloud API keys, zero monthly fees, and zero data uploads.
Why local-first AI is essential for private learning
Most AI summarizers operate as cloud web services: your transcripts, prompts, and notes pass through remote servers. For internal company talks, unlisted research lectures, or privacy-conscious users, cloud processing presents security and confidentiality concerns.
ScribeShot provides a fully offline local AI option. Using an integrated llama.cpp runtime optimized for macOS Metal GPU acceleration, ScribeShot runs Google's Gemma 4 models directly on your Mac. Transcripts, notes, screenshots, and chats remain 100% private in your local filesystem.
How local model execution works in ScribeShot
- One-Click Download: Download quantized Gemma 4 weights (2 GB to 3.6 GB) directly inside the app settings.
- Metal GPU Acceleration: Utilizes Apple Silicon Unified Memory for high token-per-second processing speed.
- Vision Projector Included: Local model handles both transcript text parsing and screenshot vision analysis offline.
- BYO Key Option: Switch freely between offline local Gemma 4 models and your personal OpenAI API key whenever desired.
- Zero Per-Video Costs: Once downloaded, process unlimited videos offline without API token charges or monthly subscriptions.
Choosing the right local model for your Mac
| Model | RAM Requirement | Download Size | Best Used For |
|---|---|---|---|
| Gemma 4 E2B | 8 GB RAM | ~2.0 GB | Lightweight processing on base M1/M2/M3 Macs |
| Gemma 4 E4B (Default) | 16 GB+ RAM | ~3.6 GB | Highest quality chapters, notes, and vision chat on Apple Silicon |
| OpenAI API Key (Cloud) | Any Mac | 0 GB | Ultra-fast processing on older Intel or 8GB Macs |
Common questions
Do my transcripts or notes get sent to cloud servers?
No. In local mode, all processing runs on your Mac GPU/CPU and data stays on your disk.
What Mac hardware do I need?
An Apple Silicon Mac (M1/M2/M3/M4) with 8GB RAM for Gemma 4 E2B or 16GB+ RAM for Gemma 4 E4B.
Is there a monthly subscription for local AI?
No. ScribeShot is a $29 one-time lifetime purchase.
Summarize videos completely offline
Download the app, pick a Gemma 4 model, and process videos with zero cloud tracking.
Try 3 videos free • 3 screenshots per video • No credit card • Zero AI cost with local LLM