Get a better heat sink and fan before you attempt to overclock. You will be frustrated if you don't because you won't be able to carry out the instructions in the video. You won't have enough thermal margin to get hardly anywhere with it. And I do not vouch for the video. I haven't even watched it. I just saw it when I was googling info about your motherboard. Your results may be different than the guy in the video. Not every FX-6300 will have the same overclock ability as they are not all cut from the same quality silicon, slight variations in mfg. process, etc. The video was only for reference as to an overview of the process and what you might expect.
There is a guide in this section of the forum for overclocking AMD FX CPUs you should read first.
I might recommend the Coolermaster Hyper 212 EVO heatsink. Lot of bang for the buck but it would require you to remove the motherboard to install a mounting bracket that goes under the motherboard. Same with most good coolers. Are you comfortable with that?