The clips are H264 1080p 25fps straight out of camera and I’m not too sure on the properties, has I said it’s my friend who is editing it.
Could it be an issue with the project/sequence properties? It plays back fine in the preview window, it’s just when exporting the footage. I tried creating a SD DV 16:9 seqeunce and putting the footage in there to export as a DV and that still resulted the same.