Not entirely DSP, but Software Defined Radio is very related. There's an excellent tutorial series on SDR over at https://greatscottgadgets.com/sdr/ that's a whole lot of fun. No coding, just an intro to many great concepts.
SDR, digital audio processing, digital image processing (especially compression and filtering), all of them have roots in DSP.
That looks like an interesting resource, but I really prefer written word and text-based programming languages to video lessons and flow-graph based configuration.