YouTube has a lot of revenue, profit isn't known as far as I'm aware. Alphabet doesn't report YouTube earnings separately, and when they were still sharing that information it was a pretty large amount of losses IIRC. But if you have sources I'm happy to change my mind
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.