Offset 4: mdat*moov{0-4096}(mvhd|cmov|rmra)
Variants 2-8 cover the following pattern, which would be desirable to consolidate but is currently not possible due to limitations of the PRONOM signature engine:
(mdat|cmov|ftypqt |pnot|skip|free|wide)*moov{0-4096}(mvhd|cmov|rmra)
(6D646174|636D6F76|6674797071742020|706E6F74|736B6970|66726565|77696465)*6D6F6F76{0-4096}(6D766864|636D6F76|726D7261)