After all the animations were rendered, I started editing. I used Adobe Premiere because I rendered and exported jpeg image sequences.

In order to facilitate editing, nest the imported pictures into one.

Then adjust the speed and repeat several times to organize all the rendered pictures.

Select the image sequence when importing, and then import the entire folder into it.

After importing all the pictures, organize them, arrange them, and add audio in appropriate places.

Here is the mask feathering used, remove the corners of the video and adjust the transparency.

After overdoing, it’s basically done, and then export.