The Pentagon officially published a statement about some leaked footage from them today saying that the videos in question indeed do contain unidentified aircraft.
https://www.defense.gov/Newsroom/Releases/Release/Article/2165713/statement-by-the-department-of-defense-on-the-release-of-historical-navy-videos/
https://www.navair.navy.mil/foia/documents
Uhh…this is kind of insane…
The videos are in this video at around the 2 minute mark.