Or the Designing Instagram[0] and Designing Netflix[1] exercises or YouTube Scalability in 30 Minutes[2]
Also found this[3] which may be helpful
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[0] http://highscalability.com/blog/2022/1/11/designing-instagra...
[1] http://highscalability.com/blog/2021/12/13/designing-netflix...
[2] http://highscalability.com/blog/2012/3/26/7-years-of-youtube...
[3] https://scaleyourapp.com/youtube-architecture-how-does-it-se...