"when i press H let the move go 15 seconds forward" in BSPlayer's language is "." and rewind is "," .But in options->preferences->key definnitions and WinLRC you can customize all those fiunctions, and in options->preferences->general->seconds to jump you may customize the part with "15 sec".
Hope this help you in knowing better BSPlayer.
BSPlayer need codecs to decode all movie format. MPEG2 files are decoded by DVD players using an built-in codec. So, to be sure you have all you need see here:
http://forum.bsplayer.org/viewtopic.php?t=3042