In the future, you should post such questions on the Q & A programmers site .
If you want to learn best practices, it is best to learn from several sources. Thus, you see the content from different points of view, and this is the best way to get your own point of view on this issue. You seem very interested in the video, although to be honest, I would not recommend them. You can learn a lot from written articles, manuals and books such as Head First Java and the official Java Tutorial , etc. with examples and exercises. You cannot learn programming without doing this.