the names are shortened in the following manner:
RoE video names:
1) alignment of campaign (Good, evil, Neutral or Secret)
2) campaign number (good and evil only)
3) map letter. (A for first, B for second, etc)
4) for two-part videos: P01 for the first part

videos from Armageddon's blade expansion
1) H3AB
2) two letter code of campaign (first letter of each word in campaign's name, omitting words like 'with', 'of' and similar)
3) number of the map
4) for two-part videos: B for the looping part

Videos for SoD:
1) H3X2_
2) two letter code of campaign (first letter of each word in campaign's name, omitting words like 'with', 'of' and similar)
3) letter of the map (A for first, B for second, etc)
4) for two-part videos: 1 for intro part, 2 for looping part