Hello I dont see a lesson on unrelated component interaction and I am having an issue with this. below is my code

Angular behavior subject not updating property values when I click ’ add task’ button. Before I post it I want to know which videos speaks about unrelated component interaction where component property keeps changing.

Bit difficult to know exactly what you need without more details, but Mosh talks about this all throughout the course. In short, you typically either share data between components using @Input and @Output decorators on properties, or you inject services into components and either bind to properties directly or make your services raise notification events that your components can subscribe to.