So basically I’m doing my school project on street art in Berlin. And these past few days I started writing about the different techniques: stencil art, graffiti, etc.

But I’m confused. When it comes tu murals, I see a lot of artworks that look like they’ve been made without any special techniques. Just with the spray can and without stencils for example. What would that be called? Is it also a different technique?

Please help me out I’ve asked all my art teachers and they don’t have a clue :((

https://youtu.be/3j4Ar7vAOgQ