Several multimedia preview concerns

(Please ask one question per thread.)

Not as far as I know, unless there is a way to make WMP uses its visualisations in either its preview handler or its ActiveX control (both of which Opus can use in the viewer pane). As far as I can tell, WMP keeps the visualisations to itself.

Please see the FAQs, specifically: Enable/fix playback of various media formats in Opus -- Enable playback of MOV, MKV, FLV movies/videos, MP3 audio, etc.