With Dashcam Replayer, you can easily read and combine the video files from your car dash cameras or CCTV camera footages on Mac.
The Mac version of the Dashcam Replayer can read any folders containing common MPEG-4 in .mp4 or .mov file formats. Several files can be merged and exported to a new file.
The raw footages or the exported footages can be uploaded directly to YouTube with the built-in uploader available.