Using QuickTime 7 Pro...

Open the MOV file in QuickTime 7 Pro,
Click the "File" menu and select ‘Export’,
Click the "Export" menu and select ‘Movie to MPEG-4’,
Click "Save" to make an MP4 copy of the file.

Alternatively, right click on .mov file,
Chose ‘get info’,
Change ‘.mov’ to ‘.mp4’,
Confirm your changes.

Not an Actor, nor married to Jamie-Lee Curtis.

#1: DSP5200SE|DSW.2|218|210|506.2|504
#2: Prime/PSU|SOtM sMS-200 Mini NEO SE|Focal Stellia
#3: Other stuff