I have a Sony bravia kdl 43 w805c running version 7. I want to be able to use the TV for video calling. Is there a way of plugging a Web cam in and sideloading the fb messanger app to do this? What's app might be more tricky.

The other option is that I could use chromecast, but it was always slow and laggy, and now it won't let me connect my phone to it anyway.

The other last way I could maybe do it is to use my raspberry pi, but it's one of the early ones. I would probably sign in with Facebook in a browser for that.

I don't know how I could get what's app to work, and I haven't used zoom before.