Can I combine .MOV Files?

iMovie would convert the files at import (in most cases) and convert again at export.
QuickTime Player Pro is copy/paste simple and would only take a few minutes.
But the limit is 99 "tracks" (audio, video or text) so you would need to join 49 files together, repeat and then the last group of files.
To make these 98 track video into two track video would require an export. Use the same settings found in the source files and export. Repeat for the other two files and then join the 3 together to make a 6 track file. Then "Save As", give the file a new name and then delete all of the source files (to save some disk space).

iMovie would convert the files at import (in most cases) and convert again at export.

In most case -- in which cases not?

QuickTime Player Pro is copy/paste simple and would only take a few minutes.
But the limit is 99 "tracks" (audio, video or text) so you would need to join
49 files together, repeat and then the last group of files.
To make these 98 track video into two track video would require an export.
Use the same settings found in the source files and export.

In this case, would QTPP export the original quality without re-encoding?

Thanks!

The original poster has 126 files. Assuming each has a video and audio track then it exceeds the 99 track limit of QuickTime Player Pro. This would require "re-encoding" (export) to join all of the files together.

QuickTime Player Pro can join your files.

Is it a lossless procedure, when QuickTime Player Pro joins MOV files or are they re-encoded?
Thanks!
BTW Can iMovie 11 do this (lossless)...?

QuickTime Player Pro will use "Save As" and place the multiple files into a .mov container.
There is no re-encoding.

Thanks! And iMovie 11 can't do this...?