*Note: The Computer Science MOOC from Stanford has been unavailable at times. Search "computer science Nick Parlante" to see if it's available elsewhere if the currently link stops working. Prof Nick Parlante has put together a great CS overview course.
Total Seminars YouTube Channel Among many IT resource videos, check out the live AMAs Monday, Wednesday, and Friday. Not only can you ask questions relating to CompTIA exam topics, but there are frequent giveaways for testing products and books.