They report YT's earnings, iirc it is about 60B (40B ads + 20B subs) annually, with 10% YoY growth. They don't disclose youtube's profits outside of Google Services (which has ~40% margins), so yes youtube is a money printing machine.

And for a long time (pre-AI) youtube was the biggest load on Google's entire infra. The number i recall was ~30% of all Google's cpu utilization was for youtube, and google spent a lot of effort optimizing it.