For me it’s the paranoia surrounding webcams. People outright refuse to own one and I understand, until they go on and on about how they’re being spied. Here’s the secret - unplug the damn thing when you think you won’t use it or haven’t used it in a while.
They, whoever it is, can’t really spy on you on something that’s already off and unplugged!
The first two have web pages and phone apps. You can find the phone apps on F-droid.
Fun fact: did you know that the youtube app on your TV is just a no-effort web browser with a URL fixed to a web page, which you could even use on your PC?