...for videos are on the cellphone W800i from Sony Ericsson? I know there is a botton for the MP3, but what about the pause for videos? I always end up watching it over again just to get to where i stopped last time.

I use SE K750i, quite similar to yours. If i am not wrong, you can only pause the video while playing the video in walkman player mode(media player mode in my phone works) - meaning not under file manager/video.Hope you understand what I mean! =]