contrary to many player, when you click somewhere in the progress bar, vlc dosen't jump to the position you clicked but act as a scrollbar
so to jump to the position you want, you have to click the cursor and maintain the mouse button.
It's not really a problem, but i think it should be interesting to add another behaviour, for example by using one of the options keys, ie crtl+click on the middle of the progress bar jump to the middle of the media
Thanks