For amateur works, the name of the amateur should be included in the statement of responsibility.  If no credit term is given, the word "by" or a credit term enclosed in brackets may be supplied.  See also 1F1.5.

245 00 $a [Zapruder film--assassination of John F. Kennedy-- amateur works] / $c [by] Abraham Zapruder.

See also:

1G5.  Compilations, amateur footage of public events, home movies, trailers, etc.

1G.  Statement of responsibility

1.  Title and Statement of Responsibility Area