Because besides the TV show one none of your examples benefit from the video/"live" modality? Or at least I wouldn't be motivated to use video for that.
or even the internet one. It would have been nice if it was like "I see you have a NetMan 402-BX with a blinking amber light. That's a common failure mode that can be fixed by updating the firmware. You need to press and hold the power button and put a pin into the reset hole..."
You know ... something more than "reboot that shit"
- explain this symbol to me
- what TV show am I watching
- how much is the house I'm looking at worth (bring in geo-location)
- How often should I be watering this plant
- how many calories are in this meal
- what type of car is this
- whats the exact name/type of this screw part
- what are the exact dimensions of this door frame
- what kind of style of art is this
- how often should I be taking this medication
- how many copies has this book sold
- which part of the world is this pic from