Thanks John that’s done the trick perfectly!!

However whilst implementing your fix I noticed that after my video clip has ended and moved to the next slide, which is a copy of the first slide with hyperlinks to slides 2,4,6,8 that contain my video clips, I cannot seem to select the same slide / clip a second time.
All I get is a blank screen that moves to the next menu slide after the 5 seconds I entered in the “advance slide” timing box.
Playback for the video clips is set to “Automatic” and I have also set “rewind after playback”.
Animation is set to “Play only” and Action is set to “None” as suggested.

Any ideas?

* This was happening before your “fix”. I just failed to notice it until now.