Are the audio/video files embedded within the PowerPoint or "linked" (referenced) to an external source. If linked externally then the other users may not have access to the source location (which wouldn't be in TRIM). Otherwise it should work fine because TRIM just extracts the file to the local file system and kicks it off.
I've done some further research after reading your responses and I can tell you that the video and both sounds are linked, not embedded. The sound files are in the Trim container but the link points to E:\ 'wav file name'. As I understand it, if the video and audio files are 'in the same folder' as the presentation then Powerpoint will find them and play them. But does this apply to Trim?
If Trim simply extracts the file to the local system then the video and sound files need to be embedded. So I need to speak to the creator of the presentation and get it changed. And that will then make it playable by anyone anywhere. Yes? :-)
I have sent a proposed solution to the owner of the presentation which is basically that we either embed the files - which will increase the size of the presentation from about 20MB to 55MB - or make sure we have a copy of the audio and video files in a common location.