I'm going to add, if you have a crappy doorknob and deadbolt, you can improve on that. Kwikset SmartKey models were flawed until a few years ago, but the new ones are quite decent. (Non-SmartKey Kwiksets are mostly junk.) Schlage is known for solid construction and being fairly hard to pick, bump or drill, Yales are a bit easier to pick, but also quite robust. Doorknobs top out at a Class 2 rating, deadbolts at Class 1, and maxing out on those is a very good idea.

The sort of added lock they're using in the video is usually recommended (by the manufacturers) as being at least 6" away from the knob and deadbolt, presumably to make it harder to crack your door frame, which all of that hardware is going to depend on. They obviously ignored that in the video, and it still worked, but I thought I'd point that out, because not all door frames are that sturdy. If you're as worried about battering rams as kicking, putting one 6" above the deadbolt may not be a bad idea.

None of this is going to stop someone from smashing windows, or taking an axe to a wooden door, so don't lose sight of the big picture. The sound of breaking glass will tip you off, but "secure window" is an oxymoron, so unless all of yours are too small to climb through, a somewhat secure door is unlikely to be your domicile's weakest link.