Video chat between two of my own devices?

I would like to be able to establish a video chat between my iPhone and my Windows laptop, so that my wife could give me information about something in the yard, for example. The only way I can figure out to do this would be to set up two Facebook accounts so that I could use Facebook messenger between them. Is there any way to do this with one Facebook account? Is there any other program that would be better for this?
(I’d really like to be able to put it on the TV via Roku, but I’m pretty sure that’s not possible.)
Thanks.
Gary C