It certainly isn’t easy on the scale that I do it on our website. Takes a lot of wiring and programming to pull this off. However if you would like to make a small version of what I do and let people control your lights via twitter, you can see my write up on hackster.io build time only takes a few hours and he code is copy and paste to get it working.
https://www.hackster.io/68270/twitter-controlled-holiday-lights-fe155d
Most of these cameras aren't your average webcam, they're IP addressable (network connected) cameras that folks have mistakenly exposed to the internet. Sites like Shodan
Can and do find these in a matter of time when they're exposed, and then most of them still have the default credentials (so you just google for "whatevermodelofcamera default credentials") and try to login.
It's really pretty simple and frankly scary how many people do this and don't realize they're letting their camera be viewed by the world (some probably don't care).
Grab an old android phone and download IP Webcam. Configure your home router to port forward 8080 to the phone's IP and you're almost done.
There's a few knobs in IP Webcam where you can show what you want enabled and what requires a password.
That's what I did.
You still need to be careful about "trust" with a VPN, here is a great resource to look into it: Detailed VPN Comparison Chart <--this is the link I meant to post before.
I got this info from privacytools.io
The camera seems to be located here, and I guess it belongs to Kuwait Petroleum Corporation. DamnTexansGhost, thanks, I love Japan!
Camera is mounted here.
Shodan. Bonus points for writing programs to interface to Shodan.
These cameras have apparently been connected for quite some time.
removed because this does sound kinda sketchy, and its clear by the upvotes that other members agree
but, I will point you in the right direction because maybe you will learn a thing or two about networking on your way
try searching on shodan.io