Video calls do have their merits, but I don't use them for my language exchanges.
Besides privacy issues, keeping your phone in your pocket allows you to multitask.
It's easier to justify the time spent in language exchanges if you can do, at the same time, other easy tasks like preparing dinner, watering plants, washing dishes and so on.
Multitasking lets you have more than 24 hours a day.
Of course, you need a high enough level in the languages you are using.
If I don't know a language well enough, I can't even breath and think at the same time.
And, even without seeing me, my language exchange partners know that I don't look like my picture profile image.
Am I scamming them?