Looking for reliable DYI videos on Google tools, suggestions?

The class, Google App 101, has helped me prepare for my high school class. It provided a good structure of what to teach in order. I want to use youtube videos with the students to teach them how to self taught by watch videos and learn a new concept.

Does anyone know a youtube channel that is excellent at explaining how to use Google tools? It must have a reliable closed captions for the deaf and hard of hearing audience.