Here is a concise summary of the provided text:
**Context:** Reaching 2 million subscribers on YouTube
**Project:** Celebrate by modifying a Tesla coil to output voice through arcs, sponsored by Keysight
**Summary of Video Content:**
1. Introduction and thanks to subscribers
2. Explanation of the Tesla coil project: modifying it to play audio through arcs
3. Technical details: measuring pulse frequencies, designing a custom circuit to convert voice to square waves
4. Assembly and testing of the custom circuit
5. Overcoming interference issues with the tower using shielding and distance
6. Successful test, though optimized for "death metal" quality audio
7. Safety demonstration: avoiding electrical shocks
8. Conclusion, new goals, and promotions:
* Challenging another YouTuber (Bobby Dukes)
* Promoting Keysight Labs YouTube channel and podcast
* Giving away 10 scopes (2 to schools, rest to viewers/patrons)
Here are the key facts extracted from the text, keeping them short and opinion-free:
1. **Subscriber milestone**: The creator has reached 2 million subscribers.
2. **Giveaway**: 10 Keysight scopes are being given away to celebrate the milestone.
3. **Equipment**: The creator uses a Tesla coil to output their voice over electrical arcs.
4. **Project goal**: To modify the Tesla coil to play a voice message without killing the sound quality.
5. **Pulse specifications**: The original pulses are 10-50 microseconds wide, around 300 kilohertz, and super high voltage AC.
6. **Microcontroller signal**: The interrupter's microcontroller sends 4-volt pulses, 14-50 microseconds long.
7. **Circuit modification**: The creator adds an amplifier, comparator circuit, RC circuit, and laser optical transmitter to modify the voice signal.
8. **Interference issues**: The tower's radiation causes audio feedback and interference with the circuit.
9. **Solution attempts**: Grounding the tower with aluminum foil, reducing power, and shielding the transmitter are attempted to mitigate interference.
10. **Success**: The project is deemed successful, especially for "death metal" audio.
11. **Safety note**: Holding a metal object near the arcs can cause burns, and the creator warns against it.
12. **New goal**: To surpass a fellow YouTuber, Bobby Dukes, in subscribers.
13. **Additional giveaways**: Two scopes are donated to schools, and others will be given to viewers and patrons.
14. **Next milestone**: The creator sets their sights on 10 million subscribers.