i make my own very simple script to preview media files before download. my macros is based on macros in this thread: http://kmeleonbrowser.org/forum/read.php?1,80883 (thx to disrupted)

# K-Meleon Macros (http://kmeleon.sourceforge.net/wiki/index.php?id=MacroLanguage)

# ---------- MPlayer - The Movie Player ------ www.mplayerhq.hu ----- mplayer.kmm -----------
#
# Dependencies : main.kmm (Go), sendto.kmm (menus)
# Resources : -
# Preferences : -
#
# -------------------------------------------------------------------------------------------
MP_OpenLink{
$_MP_Open=$LinkURL; &_MP_Open;
}

_MP_Open{
# fallback command line (may fail on NT):
$_MP="\"C:\\Bin\\mplayer\\mplayer.exe\" %1";
index($__data,".")>index($__data,"%1")?$__data="\"C:\\Bin\\mplayer\\mplayer.exe\" %1":0;
$__data==""?0:$_MP=$__data; exec(sub("%1",$_MP_Open,$_MP));
}

_MP_BuildMenu{
index($macroModules,";SendTo;")>&_MP_BuildMenu_Default;
}
_MP_BuildMenu_Default{
$__m="Play in &MPlayer";
setmenu(LinkOpenExternal,macro,$__m,MP_OpenLink);
}
$OnInit=$OnInit."_MP_BuildMenu;";

# -------------------------------------------------------------------------------------------
$macroModules=$macroModules."MP;";
[\code]

i use mplayer console but who wish can use gmplayer (mplayer with GUI)

i found bug, but i think is not in my macros.
when i make right click on link and choose "Play in &MPlayer" macros work. but if i make right click and choose "send page to > internet explorer" page is opened in internet explorer. after this my macros not work - aways open internet explorer instead mplayer. and i must restart k-meleon to work...