Bands are a great addition to your workout regimen, whether you're advanced or a beginner because they were initially intended for rehab patients.
The first video features me doing an exercise called the military press. Simple enough, however, the weights I was lifting were supported by the bands only. The constant movement calls for the stabilizer muscles to fully engage throughout this exercise. Every muscle group has stabilizer muscles - they're usually the smallest muscles, so a lot of men neglect them trying to achieve maximum size. But if there is enough of an imbalance between your small and big muscles, you'd better gird thy loins for a serious injury.
I had one of my clients, Jessica, do a similar workout. She's a small framed lady, so it shows the range this piece of equipment has.