Each topic or feature is described separately with hands-on examples, we have a plan to develop YouTube videos and those will be posted later.
TwinCAT HMI is the most modern toolset provided by Beckhoff. The most important thing is that we don’t need to care about the nitty-gritty of thread, TCP/IP, HTPP/S, etc. But we need to focus on our actual task and some level of JavaScript. One of the beauties of TwinCAT HMI is that you can expand it based on your imagination. You can develop a full-featured SCADA system and display/manipulate data from other types of PLC (for example Siemens, Allen-Bradly, etc over the supported protocol such as OPC UA).
If you want to learn TwinCAT HMI, this site gives you all the knowledge you need, let’s start.