Hello,

same problem here.

What does it mean:

First you need to start up in GUI mode after reboot
You need to enter the GUI mode under the same login as the ssh connection

?

UV4L looks like something different than an application to make video calls.
Does it mean there is no real application for doing that with a Raspberry?
Or is there a more specific guide/site explaining how to use UV4L for making video calls?