A1 level course is for complete beginners and A2 level course is for students that already know some basic greetings and phrases or how to introduce themselves.
Video lessons are 20-40 mins long, excluding the time it takes to do an exercise.
It is a mix of both. The goal of the courses is to be able to form sentences spontaneously, using grammar rules and practical vocabulary.
No, you get a lifetime access and you can learn at your own pace.
You can download PowerPoint lessons, while videos are not available for download.