hi8, miniDV.

A full description is below. main difference is that hi8 is analog format and miniDV is digital. On the other hand, that is the only difference for digital8 and miniDV.

http://en.wikipedia.org/wiki/Hi8


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drill down:

the process of dividing information into a hierarchical scheme, honing in on a small area; thorough investigation and discussion of a narrow topic


(v) In information technology, to move from summary information to detailed data by focusing in on something. To drill down through a series of folders, for example, on a desktop means to go through the hierarchy of folders to find a specific file or to click through drop-down menus in a GUI. To drill down through a database is to access information by starting with a general category and moving through the hierarchy of field to file to record.
(n) Spelled drilldown. The act of focusing in. For example, "He got the information he needed through a drilldown of the database."