It's very difficult to see what's going on in the video, but like I said, I'd be very surprised if anything would happen without memory being installed. I'm not sure why anyone would even bother trying to power up a system without a necessary component, anyway.
I'll restate what I said above. Wait for your memory, install it, as well as install the motherboard properly into the case, and then try it. Post back if you have an issue. The beeping you heard is likely telling you there's no memory present.