Ectoplasm from Ecuador?

This video has been filmed off the monitor screen of a security camera in an office in Guayaquil, Ecuador.

Jose emailed this recent video to us a few days ago and we spent a fair bit of time studying it before offering a tentative opinion as to what's going on. But we have no way of knowing if our possible natural explanation is on the mark. To enable further discussion and collect other opinions, Jose has kindly given permission for us to post this extraordinary video on our site. It's rather mesmerising.

BTW, don't let the title of this blog lead your thinking. It was just too catchy to resist, sorry.

Comments are most welcome. Please do not copy or distribute this video: it is copyright.