Cant view videos on some websites

Hello!

I recently re-installed my windows ( I did full format of my disk )

After that i installed all neccesary software, like codecs, flash player, adobe reader. But i still cant watch videos on some websites ( nahnoji.cz )

I am using k lite coded pack 9,9,9 full, which contains all of the most used codec. So i came to conclusion the problem is within flash player or some damn settigns i have no clue of.

Is there any chance to get a help, i tried searching the internet but no one can adress my problem.

I think i am using 64 bit version of Mozilla firefox, althought i am not sure of it, as i cant check the version properly, i just see i x86 in the unninstaller software.

Also for some reason, in my control panel, there is the flash player panel, but it says : Flash player ( 32bit ) even though i downloaded 64 bit version