Stellar Repair for Video is a powerful tool for repairing corrupt, damaged or generally broken video files. The Windows build supports WMV, ASF, MOV, MP4, M4V, 3G2, 3GP and F4V files, while the Mac version supports MP4, MOV, M4V, M4A and F4V. There's no complexity here, no technical settings to consider. Just choose a file, click Repair and wait. The program supports a good range of video formats, and doesn't need a working reference video to make the repair, so if you're desperate to fix a file then perhaps it can help.