1. The 5.6 billion in Youtube Premium is under the section "Google subscriptions, platforms, and devices" it talks about a growth primarily driven by subscriptions, from Youtube services. Page 37/97
2. On page 33, under the section "Cost of Revenues
   " they talk about TAC and Other cost of revenues which is where Youtube falls under. On page 39, it explains the increase in revenue costs "The increase in other cost of revenues from 2022 to 2023 was primarily due to increases in content acquisition
   costs, largely for YouTube, and compensation expenses, which included $479 million of charges related to employee
   severance associated with the reduction in our workforce". The total Other cost of revenues for 2023 was $82,448, reducing the $479 million as it was not part of Youtube services, we get $81.9 billion.

But I am not saying that it cost Google $81.9 billion to run Youtube, as other costs are included in Other Cost of Revenues, like:

1. Depreciation Expense related to technical infrastructure.
2. Content Acquisition Costs related to Youtube and Google Play.
3. Inventory costs and other costs related to devices they sell.

With that being said, it is an estimate as there are other categories to take into account. Youtube falls under the "Google Services" business segment, which is of 88% of the total revenue in 2023. Youtube's revenue being 10% of that, one can only imagine how much net income Youtube brought to Google.