I am using unity personal edition.Can I import 360 pano video from outside and mark some objects(placing text) over some objects/buildings inside the video using unity personal edition.Is the editing of the video possible?
Yes, You can.
Here is the tutorial how it can be done 360 degree video making (oculus rift, unity3d, blender) on Vimeo
Actually You don’t need Oculus to watch it. It can work on flat screen or with other headsets and in case of this tutorial it’s GearVR from Oculus anyway.