For the recovered AVI video files, in most cases, they can play directly. In case some of them cannot play, probably the structure or header of the video files was broken due to partially overwriting, damage or crosslinking.

If your recovered video files can play directly without any problems, please discard the following message and no post process is required.

If some of your recovered video files cannot play properly, you may search the net and try some video repair tool on the recovered files. In most cases, they will fix and make them playable.

http://files.datarecoveryblog.com/downloads/dvrsetupv102.exe

Above download is a freeware, which is provided by third-party. It is for AVI files only.

If that does not get satisfied results, you may re-try CardRecovery, on step 1, option 2 of CardRecovery, choose only "Videos" Option, and uncheck "Photos" and "Audios" options. Then proceed with a full scan, and CardRecovery will retrieve video files only. For the recovered .avi files, you may re-try the above video repair tool. If still no success, probably the video files are not recoverable in this case.