*coughs coughs*
So, gentlemen.
I heard that people including me had troubles with videos in conversions especially with yener's CI.
The solution is not converter or formatting anything, it's codecs. Thanks to mikey's suggestion i decided to re-install codecs and now videos are working without problem. If you have troubles with them, i suggest you to install K-Lite Codec Mega Pack. I'm giving the link of their website, it's scam-free BTW.
Code:
http://codecguide.com/download_k-lite_codec_pack_mega.htm
If you're 64Bit user, also install 64 version for better performance:
Code:
http://codecguide.com/klcp_64bit.htm
To download codec pack, click links below of 'Location' title.
Test and report back
Cheers