[Alt]/[3] opens Media-info window
(or rightclick > Options > Media info)
Codec(s)/filter(s) used by BS.Player for playback of a specific file can be established by
(rightclick >) Options > Filters > Advanced
(Clicking on the [+]-signs reveals further info and access)
If you e.g. see that ffdshow is used for video and/or audio:
1. click on the [+] in front of "ffdshow Video/Audio Decoder"
2. then click on ffdshow resp. ffdshow audio
3. select the box "OSD" below "Info & CPU"
(Other decoders may have similar options) 
Do you really want to see
all that info and - at the same time - still watch the movie?
So, what is the size of your skin vs. size of movie-window? Or do you want to display movie on one screen and the controlpanel with all that info on another?
(There are several programs (<>players) more appropriate for the task of providing info on media; e.g. read item (3) of my Help2Help-post).
I think you're pretty unique in your 'wish list'. In this connection I would invite other users with similar wishes to let the developers (which I'm not; I'm just a user like you) know so by adding their posts to this thread.