Udemy Courses, are they worth it?

Udemy is a great source for education, but it really depends on how much effort you put into learning and exploring after you purchase a course

I'm thinking of trying one of those courses. After the purchase can we rewatch later the same course as often as we want?

For beginners, it's a great start, especially for hobbyists. I actually highly recommend them for programmers starting out or those learning a new paradigm!

I guess if you want to learn some quick stuff ? I personally never tried it.

Eu ouvi sobre eles, mas pessoalmente no tentei nenhum eu mesmo.