If you have the camera powered up and constantly connected to a WiFi hotspot, then you can use the BlackVue Viewer to connect to it via the cloud and view live. But for only 5 minutes per day unless you pay for a subscription.
If you have the camera connected to a WiFi hotspot *you own* (ie. your own wireless router inside your house), then you can direct-connect to it via the assigned IP address. The URL to direct-connect is:
http://<ip address>/blackvue_live.cgi?direction=R
(or ?direction=F)
Public WiFi hotspots won't let you do this. I don't know if your vehicle's built-in WiFi will, but I'm betting it's not designed to allow incoming access from outside the vehicle. Making this all work required a bit of advanced knowledge of networking, and takes a lot of fiddling to get just right.
Brad.