Dear Mr. Gibson,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the series John D. Ehrlichman's Files, 1/20/1969 - 4/30/1973 in the White House Staff Member and Office Files (Nixon Administration) (Collection RN-SMOF) that includes the White House Staff Super 8 Motion Picture Film subseries consisting of 204 rolls of color silent "Super 8" and one roll of color silent 16mm motion picture film found in the office files of John Ehrlichman. The Super 8 films also were shot by H. R. Haldeman, Larry Higby, and Dwight L. Chapin. In addition, we located the series White House Motion Film Unit Files, 1969-1974 in the Records of the Naval Photographic Center (Nixon Administration) (Collection RN-NPC) that consists of 517 separate titles of motion film coverage of selected official activities of President Richard Nixon filmed between 1969 and 1974 that may be of interest to you. These records have not been digitized. Please contact the Richard Nixon Library (LP-RN) at firstname.lastname@example.org for access to these and similar records.
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We hope this is helpful. Best of luck with your research!