finished editing and problems

We have finished editing now and there are several good and bad sides to the finished project, i like the general all round feel of the music video, and am generally pleased with editing to the beat and the footage. However there have been issues with the technical side of editing. At the very beginning of the project, on uploading the footage i found final cut wasn't working, so i had no choice but to upload to imoive because i didnt have enough time, so by uploading to final cut then exporting the footage and the importing into final cut we found the quality of the footage had been dmaaged. There now is many lines running through the footage, runing the overall effect of it. Three quarter of the way through rditing the music video aswell, i finished, saved it, only to find that the programme would not open it again, so i have to re-edit from the last saved point.