@Duma,The sphere shape in video 1 can easily be achieved with displacement mapping, then animate it rotating the sphere in a 360 degree loop cycle. Adding sound to the timeline would be done with a video editing program, Adobe premiere pro or such as that. The second sphere is most likely a procedural texture with a skull embedded into it and animated. These examples are rather basic modeling processes, the skull you could purchase from a vendor or study anatomy and modeling, then do it yourself. I am not familiar with Adobe after effects so I have no idea what its capable of. You should check out some online educators, https://www.lynda.com/search?q=3+d+modeling
Have fun.