So that when you start BSPlayer it automatically starts showing a certain video?
No, not by directly starting BSPlayer.
You could e.g. easily use its commandline options to that purpose though.
E.g. create a desktop-shortcut (or maybe you call it a "link"?):
Rightclick on an empty part of the desktop > select "New" > "Shortcut" (or "Link"?).
Then type in the commandline-box e.g.
"C:\Program Files\Webteh\BSPlayer\bsplayer.exe" "D:\Movies\test.avi" -eend
(You should - of course - change path/filenames)
Clicking on this desktop-shortcut will open BSPlayer and test.avi will start playing,
provided the option "Auto play" is checked (selected) under [General settings] (rightclick > Options > Preferences ).
the -eend parameter will close BSPlayer when the movie is finished.
For further info about parameters please read "cmdline.txt" in subfolder "doc" of BSPlayer's installation folder.