For making this scene, I recorded a video of my laptop (while I was studying for my exams). In blender, I camera tracked it and then made a surface mimicking the shape of my laptop.

Then, I added a sphere and using geometry nodes, I gave it tentacles and made it stick to the nearest surface, in this case it was the laptop shaped surface.

When everything was looking right, then I rendered the scene, masking out the surface, and then composited it with the original clip.