What is the ruling on YouTube channel earnings from advertisements and from subscriptions of individuals who do not wish to see advertisements?

There is no objection to earning through taking a known percentage from the subscriptions of people who do not wish to see advertisements, as this falls under the category of ijarah (leasing/hiring) or selling benefits and services. Similarly, there is no objection to profiting from displaying advertisements on your channel, provided that the advertised product or service is permissible.