Bookmarks add a permanent resume point to any video or audio file so you can go back to the point you were at whenever you want, the resume icon only applies to the last file you accessed. If you watch video 1 file for instance then shut the archos down the resume icon will take you back to video 1 file when you next switch on, if in the meantime you have watched video 2 file the resume icon will take you back to video 2 file. Bookmarks add a permant resume marker to each file (they can be deleted quite simply)
Hope this helps.
I set some bookmarks up but the next time I went into the folder, there were no bookmarks being displayed, but they were there as an hour or so later when I went back to the same folder, the files had bookmarks (ticks) next to them.
Does it take a while for the ARCHOS to recognise them ??