Here is a concise summary of the provided text:
**Title:** Uncovering Hidden Google Tricks (Part 4)
**Content Overview:**
1. **Introduction**: Announcement of a Christmas raffle with tech prizes (PS5, Xbox Series 6) and participation rules.
2. **Google Tricks Series (Part 4)**:
* **Trick 1:** Search "txaltxa zelai" to activate a dancing screen.
* **Trick 2:** Search "google sky" to explore the solar system and constellations.
* **Trick 3:** (Legacy) Play Space Invaders on Google (no longer works; emulator link provided).
* **Trick 4:** Access all Google Doodles ever published via a specific search.
* **YouTube-specific Tricks:**
+ Alter video title font by searching "a doctor".
+ Find a video with a stuck view counter by searching "cool words from youtube".
+ Make the timeline shine like a rainbow by typing "awesome" while watching a video.
3. **Special Google Website Trick:** Visit `www.google.com` (diagonal type) to interact with a coffee-making animation.
4. **Mysterious Leaked Trick:** A potentially upcoming trick involving searching "weasley poster" (currently not working).
5. **Conclusion:** Invitation to subscribe, like, and follow the creator's social networks.
Here are the key facts extracted from the text, keeping each fact a short sentence and numbered for reference:
**Google Trivia and Features**
1. Google has a 22-year history of surprising users with secret tricks.
2. Searching "txaltxa zelai" on Google triggers a dance animation to a famous song.
3. Google once had a working "Space Invaders" game simulator in its search results (now inactive).
4. Searching "Google Sky" and pressing "I Feel Lucky" takes you to an interactive solar system map.
5. Google publishes "Doodles" to commemorate important people or events.
**Google Doodles and Easter Eggs**
6. Searching "all Google Doodles" and pressing "I Feel Lucky" shows all published Doodles worldwide.
7. Visiting `www.google.com/diagonal` displays a coffee maker that serves a virtual cup when clicked.
**YouTube-specific Tricks**
8. Searching "a doctor" on YouTube and clicking the first video results in a unique font title.
9. The video "cool words from youtube swiss austrian" has a view counter stuck at 300.
10. Typing "awesome" on a YouTube video's keyboard makes the timeline shine like a rainbow.
**Contests and Other**
11. A Christmas raffle was announced, offering prizes like a PlayStation 5 and an Xbox Series X.
12. To participate in the raffle, users must subscribe, like, comment, and follow the official Instagram account.
**Unconfirmed/Temporary Trick**
13. A leaked trick involved searching "weasley poster" and interacting with an image to trigger an animation (reported to be short-lived or possibly a prank).