How to upload Image over image

[ Moved to the Fixing WordPress sub-forum. ]

Good morning!
Anyone knows how can i make the same as it is done here:

http://metropolismedia.bg/%D1%81%D0%B8%D0%BC%D1%83%D0%BB%D0%B0%D1%82%D0%BE%D1%80%D0%B8-2/

Video is not nesecerry, most important is to upload a chosen image and it goes to the empty space of the picture on the right side:
http://metropolismedia.bg/image/amtrakia.png

Thank tou in advance!