Sorry I didn't see/reply to this until 2 mo. later. Are you still looking? I'm curious what you mean by keyboard videos? Could you elaborate a little on what exactly you're looking for in these videos? Piano playing instructions, or something else?
Udemy has affordable lessons for learning the piano. Many are suitable for use on keyboards and reference that in the course information. They run sales frequently. You may want to get on their mailing list.