Hello friend. I watched the video.
You said you smelt the burning smell from your motherboard area near the VRM's. These are the voltage regulation modules, and you fried them because you have your CPU cooler setup the wrong way. You should have facing towards the back of the case and a fan exhaust that air out. This is very important because it blows air over the VRM's. These are very sensitive in AMD setups and they will blow without airflow.
I regret to inform you that when the VRM's fry they usually take the CPU with it. However, the signs of dead CPU are usually an infinite boot loop. You're just not getting any POST (power on self test).
Now, take one stick of RAM. Leave the one closest to the CPU in. Take out power cord, VGA connector, and LAN cable. Turn off Powersupply switch. Press power button to discharge system. Take out motherboard battery, then find the CMOS reset Jumper. it's usually on the right side of Gigabyte motherboards. Once you have found this jumper touch the two pins together with screwdriver to make electrical connection. Hold this for 5 seconds. Now put back in battery and turn on computer. If P.C boots, then turn off and put in other stick of RAM.
If computer does not boot, take apart entire system and try to start computer on table to see if case is causing an electrical short.
If computer does not boot, take off CPU, take out RAM, take out GPU, take out every electrical connection and setup and try again.
If computer does not boot, likely CPU or PSU dead.