The high-definition video camera, Canon HF20 creates AVCHD files with an extension of .MTS. A super easy method of splicing scenes together it to use the Unix/Linux command
cat, no video editor required. Here is an example:
cat scene1.MTS scene2.MTS > bothscenes.MTS.
YouTube processes these concatenated files just fine. Below are links to multiple scene videos I spliced together with the