I use Chrome as my browser. Google owns both Chrome and YouTube.
I can't remember the first two incidents any more, but they were on the same scale as the third incident.
The third incident: two days ago I asked ChatGPT to give me the 600 most important words in Spanish. Today, YouTube has recommended me a video titled "100 most important words in Spanish". In at least the last three months, I have not asked YouTube for a Spanish-language-learning related video.