mkay... doesn't work... i can't get it work...

so you have to stick to the shortcut-method until someone points me the direction to launch my script on startup. ^^

the only thing i could do in addition would be checking which bootvideo is currently used so that another default.conf gets loaded.

(in my current version the same bootvideo can be played several times because maybe the default.conf gets overwritten by the same default.conf)

so... if you want to have a new bootvideo each time you click the shortcut... leave a comment here... ^^
(or program it by yourself ;D)