If you are interested in learning more about robotics and finding that YouTube video and blogs are just not as detailed as you desire. I recommend that you take a look at on-line courses that are available at some of the leading universities.
The Autonomous Systems Lab at ETH Zürich has courses that are available to be taken on-line. Some courses are given as an MOOC (Massive Open Online Course). I have been following along with the Autonomous Mobile Robots - Spring 2018 course. All of their lecture material is online and free to download. It is a great introduction in to the engineering that is used to create Autonomous Robots.
It is also a great way to see what the cutting edge at these universities are doing!