How is this music video effect and other similar effects are done, in the video below at 4:44
If you mean this:
That's just 2 shots laid over each other with opacity adjustments and blend mode (possibly overlay, maybe screen) adjustments. The quick cutting could be just quick cuts or it could be posterize time. The opacity of the clips is also animated. This isn't something that you can achieve by simply applying a plug-in and clicking once.
Put a bunch of different movie/image layers on top of another and start setting their opacity to different values.
Then play around with each blend mode.
You will start seeing the effect of the image tha Rick just posted.