Normally it is called pinned video or image
it can be done easily in krpano and Pano2VR5
You can also embed high resolution images that pop up inside a THETA Panorama
On this example the Video Popsup to 100 % when you click on it and closes the same way
Some Nice Pano2VR examples on pinned video from Tallinn University Tour by: Lauri Veerde
Sound Studio
Table tennis
Gymnastic Hall