edit: Before I get a bunch of downvote nonsense, this is a serious answer. Dogs (especially big ones that bark when excited) are terrific home protection. No intruder is going to risk a tussle with a couple of big dogs hell-bent on protecting their home. Plus they're totally good with people they already know and trust arriving, even if we aren't there. All a camera will do is record the fact that you're being robbed.
Didn't Myth Busters do a show on how a piece of steak will get you past all but specifically-trained guard dogs? The only danger one would face with our dogs is getting knocked down while they try and get the steak.
I have dogs because I love them. Their value as a home security system is just a bonus.
[plus]
to extend the logic, defending a litter takes great priority over a steak snack.
All a camera will do is record the fact that you're being robbed.
A security system often has decent sensors to alert you even over the phone which dogs do have trouble with.
Dogs likely raise the barrier to entry for a robbery and criminals will usually just choose easier targets.
If you are going to get a dog to be part of your family then do that, but getting a dog as a security system is just a poor idea.
EDIT: small dogs can be an advantage in this case https://twitter.com/thegrugq/status/973969277647638529
2 Belgian Malinois trained in French Ring which is the French equivalent of "Schutzhund" (minus the tracking). 3 years old they won't take food from strangers and are stable and confident as fuck. They once pinned a junkie into a corner of the garden which jumped the fence to burgle us while we were out. He was stuck for several hours (until the neighbors called us to inform us that "they're barking an awful lot today". The guy wasn't harmed but neither did he dare to move. :D
Though the reason we got these boys was because our border collie was getting really old and let 2 guys jump the fence and grab everything from the terrace while we were having a BBQ in the back yard (head-desk). We only found out because they grinned and waved to my daughter who was going to the front entrance to grab some stuff from the kitchen. Also she (the dog) wasn't trained like the Mals.
More generally I protect myself (including my privacy) by not living in a constant state of fear.
I don't do anything with alerting yet, but there are many ways to solve this.
Having a next door neighbour who's retired and really good at spotting when things are out of the ordinary helps too.
Here is their security page. https://canary.is/security/
I'm not entirely at ease with using a cloud service, but I'm way less comfortable with directly exposing the DVR's access directly to the Internet.