First part of the video stills.
The caption says "Kaigunsho kenetsu dai 17go" (Navy Ministry Censorship No. 17). It's an approval seal that the film has been checked by the Navy censor. Note the general shape of the building and the 4-engine US bomber model on the side of the stairs.
Another building in worse condition is standing next to the one in the previous still and in front of it is placed a plane without engine and tail. It is an old A6M2, note the folded wing tips. This one was probably used to train new pilots.
A line-up of more than a dozen Zeros. The visible cowlings indicate most, if not all, of them are A6M5 Model 52s. Note also the clothes of the ground crew members. The big mountain in the background means that this is Rabaul East airfield, aka Lakunai airfield, next to Tavurvur volcano. Rabaul had five airfields, three of them for fighters, the main being the Lakunai airfield where the headquarters of the 11th Air Fleet was located.
The first A6M5 taking off has a hinomaru with its white surround darkened and a white band on the fuselage. Unfortunately the tail marking is not clearly visible but most probably it's a "9-155".
The second Zero taking off is also an A6M5 with a similar paint job with the previous one, minus the fuselage band. The straight to the tail green top camo shows this are Mitsubishi built Zeros. The tail marking is very clearly visible; "9-159". There is an issue with the unit. Researchers/authors like Watanabe and Nohara believe these planes belonged to the 204Ku but this has not been confirmed beyond any doubt.
Two more tail markings are clearly visible, "9-166" & "9-169", and possibly "9-164".
Again note the clothes of the ground crew members.
More A6M5s taking off. The tail marking of one of them is not very clear, either "9-109" or "9-169".
This one has the lower part of the wheel covers removed.
One of the most interesting Zeros is this A6M2 with the lower part of the wheel covers and wheel well doors removed but also note that it carries one No 3 Mark 3 rocket. The tail number is very difficult to discern. Probably "9-123".
In these stills note the revetments made of empty fuel drums protecting two aircraft between them, again on Rabaul East Airfield. Each revetment has a number in white on the top drum, the one on the left has a "3", the one on the right a "2".