There are very few people from the wider population which did not do any video editing courses or who did not read any video recording guides that as technology has advanced, more videotape formats have come into use and older ones have disappeared.
In the early stages of videotape, successive formats became less expensive and often smaller in size.
In the late 1980s, this trend was reversed with the introduction of D1 and D2.
Digital video proved more expensive than its precursors and thus did not rapidly replace older formats as did one-inch and professional half-inch tape.
Another disadvantage of assemble recording which not so many people does seem to know is that with the exception of two-inch quad, all video formats discussed here are helical-scan recordings.
Quad machines rotate the record heads perpendicularly to the tape, whereas helical-scan machines spin the record heads at an angle to the tape.
Helical scanning allows the video and audio heads to reach more of the videotape, allowing the use of narrower tape.
Both two-inch quad and one-inch Type B format use segmented video recording, which requires more than one revolution of the video head to record a field of video.
Segmented recordings cannot be viewed in still frame (also called freeze or pause) or slow motion without additional equipment.
If you feel the need to continue in informing yourself a little more about all this concept of what videotape formats are, make a quick search on internet and you will most likely find more useful information about this topic.