…represents a specific, now-obsolete file type: an AVI file, ripped from a DVD, with a resolution of 640×480 pixels (standard for 4:3 SD video), and labeled “fixed” – likely correcting sync issues, audio glitches, or frame drops from earlier releases.

Preview clips and partial lessons can occasionally be found under titles like "Sailor moon dance lesson pt1" or more details on the choreography for those songs? Super Dance Lesson - WikiMoon

The "640x480 xvid dvdrip fixed" tag reflects the era of early internet fansubbing and digital preservation: