Remote User Interviews – Setting up for minimum technology problems

I'm trying to arrange some remote user interviews and while I am Tech Savvy myself, I can't assume my interview subjects will be. Does anyone have a tried and tested set-up and method.

Ideally, I'd prefer a video chat session that I can record but here are my concerns.

Calls to interviewees from desktop to desktop can result in issues like microphone/video not working correctly due to it not being set up correctly their end. Also, they may not even have access to a computer.

Appear.in requires no additional software download but it does not work on Safari or IE browsers. They may not have other browsers installed.

Hangouts is good but requires the additional steps of downloading and setup of software for the interviewee.

Facetime excludes non-Apple interviewees.

Whatsapp video from mobile to mobile may work, but how reliable is the built-in iPhone screen recording software for recording?

Facebook messenger video chat works from desktop and phone but I feel like asking for someone's Facebook details may seem a bit odd.

Skype requires downloading additional software and having an account which seems like a big ask for non-Skype people.

Anything else I have missed?