The people can be done by first recording your subject in front of a green or blue screen. Then, import that footage and apply a keying effect to remove their background – such as color key or keylight. Once you have done that, create a new solid (ctrl+Y), then make it white or whichever color you wish. Drag that onto the bottom, then you have your people on top of white. You can then move them around on screen and keyframe them as you wish. The blur around the edges – you might be able to do this by making a mask around them, then feather the mask.
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