Screencasts are often the quickest and easiest way to learn about a new subject. An instructor can present info via video while also showing you how to perform certain tasks.
Many premium-quality screencast services cost money – however DevFreeCasts is a stupendous compilation of free screencasts from all subjects.
You can learn about topics ranging from PHP, Angular, C++, Git, Rails, even Visual C# if that strikes your fancy.
Note that DevFreeCasts is not associated with any particular website or screencast recorder. It’s just a curated list of the best free options out there for developers.