Use Geometry Nodes to create particles, use node shader to partially cover the object and Use Modifier to create chaos of particles. Requires Blender version 2.9 or later Timestamp 00:00​ Introduction ...

Logo reveal uses basic Blender techniques to create and use After Effects to reverse motion. You can use other software to reverse motion instead of AE. I don't know if Blender can do this? 00:00 ...