Here is a concise summary of the transcript:
**Title:** "The World's First Petrol-Powered Toothbrush" (Episode of "Bad Inventions")
**Summary:**
* The host pokes fun at the trend of electrification by attempting to create a combustion engine-powered toothbrush.
* They purchase a tiny (2.5cc) combustion engine and, after some trial and error, successfully build a functional (albeit impractical) petrol-powered toothbrush.
* The device is showcased, highlighting its absurdity (e.g., smoke emission, limited maneuverability).
* The video also includes a sponsored segment for Car Vertical, a platform providing detailed reports on used cars.
* The host concludes by inviting viewers to share ideas for more outlandish inventions.
Here are the key facts extracted from the text, each with a number and in short sentences, excluding opinions:
1. **Project Concept**: Creating a toothbrush powered by a combustion engine instead of electricity.
2. **Engine Source**: Found a suitable mini engine at a store in Novate Milanese.
3. **Engine Specs**:
* Made in Taiwan
* 2.5 cubic cm displacement
* 1.5 horsepower
* Can reach 30,000 rpm
4. **Initial Engine Test**: Successfully started the engine, which can reach approximately 80 km/h.
5. **Toothbrush Base**: Used a pink Oral-B toothbrush as the base for the project.
6. **Mechanical Setup**:
* Required a series of gears to reduce revolutions
* Utilized a pulley system for acceleration regulation
7. **Transmission Creation**: Successfully created a transmission using brackets, a belt, and gears.
8. **First Test**: The assembled mechanism initially failed to move, then succeeded after adjustments.
9. **Acceleration Mechanism**: Fixed and successfully tested the acceleration mechanism.
10. **Final Product**: Created the world's first petrol-powered toothbrush.
11. **Sponsor Mention**: The video is sponsored by Car Vertical, a platform for car history reports.
12. **Car Vertical Service**:
* Provides detailed car history reports
* Includes mileage, accident history, and more
* Offers a discount with a specific code mentioned in the video.