Can I put my Iphone 4S sim into an Iphone 5?

Without cutting it down, or contacting my provider, essentially can I do it in a simple "plug in and play" manner?

Nope. It's a different size. I tried to cut my iPhone 3 sim so it would fit my iPhone 4. Really really really not a good idea. You need a new sim.

No. The 4S uses microSIMs & the 5 uses nanoSIMs. Smaller SIM.

I heard there's a way to put into iphone 5, but you need to check it in youtube

No the iPhone 5 takes a nano sim (I looked at it in my hubby's iPhone 5. Extremely tiny sim) The 4s takes a micro sim, which is bigger.