MiniDV is using magnectic tape as storage and use the discrete cosine transformation compression technology. Does the use of magnectic digital tapes no more film?
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Film is specifically a medium in which each frame is photographically exposed to capture the image. It comes in a variety of formats, but the key property is that it must photographically capture the image through photosensitive film.
Magnetic media, regardless of being analog or digital, such as that used in MiniDV, Digital8, Hi-8 and even VHS tapes is not film. It is tape.
Similarly, modern cameras now often go direct to disk, using either memory cards, hard drives or in rare cases, optical media to record to, thus avoiding the need for tapes which require running it from beginning to end.
The term filming is still often used when capturing video with these latter formats, however it does not make them film. It just means that we reuse the common term even though the underlying technology has been replaced. Technically it is video.