That's right Kwag : some players (as my Thomson) automatically skip in 5 minutes steps on all the VCD that don't have any chapters.
Here Edlund turned PBC off, that means that the chapters on the disc aren't used, and so the above facility is provided by the player.
With the Thomson I can even display a mosaic of 9 animated thumbnails corresponding to 9 point in the disc and jump directly to this point (it's like a DVD menu, but created by the player

)
This last feature isn't even writen in the doc of the player :-p