Solved Stretching/Looping background media

I have a 45 second video clip that I am using for the background media of my video. I have a 3min 46 second audio clip to accompany the video. My question is how can I "stretch" the video clip so that  the background media doesnt go black after 45 seconds. i dont understand the "loop " process". Hope I have made myself clear, thanks in advance

By default, all videos placed on the Vegas timeline, will loop playback if you keep dragging the video to the right.
All you have to do is drag the right edge of the video until it meets the end of your audio track.
You will notice a notch will appear in the top edge of the video - the "notch" indicated the end of a video and beginning of loop point if you drag the video past the notch.

 Thanks for the prompt response .Not sure where I need to place cursor to drag to the right , sorry

I've DVDA7 and cannot find a way to loop it so look forward to finding out more.

Having played around with this I suspect the only way to do it is to create a Music/Video compilation.

I'm sorry...
When I answered this question, I had VEGAS Pro stuck in my brain and didn't realise your were talking about DVD Architect.

I will assume you have added a video as the "background" media for a menu screen.
As far as I am aware, you can't loop video playback at a different point to the audio track.

Using the simplest solution to fix this problem, I recommend opening Vegas Pro and looping your 45 second video until it lasts for 3:46 minutes.
Then render a new looped video which can be used for your background media.