The source of today's video is the Facebook. It's a beautiful and very clear video but unfortunately no details regarding the date and place were included. Nevertheless, the featured Mitsubishi G4M "Bettys" all belong to the 732 Kokutai as indicated by the number "32-" on the tail.
Leading "Betty" expert Kobayashi-san commented:
"The video shows early torpedo attack training scenes from the 732nd Kokutai. The 732nd was the unit responsible for the southwestern theatre. They were based at Ayer Tawar airfield on the Malay Peninsula. A collection of photos appears in DNK's “Sea Eagles of the South Seas”. But these are remarkably clear images. The interesting thing is the serial numbers, like “732-202”. Attack aircraft usually have serial numbers starting with “3” in the lower section [i.e. "-302"]. The aircraft itself is a late-model Type 11, recognisable by the tail gunner's position being cut away."
The 732 Kokutai was primarily focused on defending the Dutch East Indies, and, as a land-based attack aircraft unit, engaged in bombing, assault, and reconnaissance operations during the latter stages of the Pacific War.
The 753 Kokutai, which had been tasked with bombing missions from the Eastern Dutch East Indies towards the strategic Darwin area in Australia, found itself confined to the Kendari airfield on Celebes Island since the start of the war, with no time for reorganisation. However, by the latter half of 1943, its combat strength had diminished, making its replacement necessary. Consequently, the newly formed unit was the 732 Kokutai. Adequate training time was secured, with deployment to active duty planned for the spring of 1944. However, to counter the reinforcement of the Royal Navy's Eastern Fleet, the unit was deployed to the Western Indian Ocean theatre before training was complete.
1943
October 1: Formed at Toyohashi Airfield, with Oita Airfield as its parent unit (authorised strength: 36 Mitsubishi G4M "Betty" Land-Based Attack Aircraft). Placed under the direct command of the Southwest Area Fleet's 13th Air Fleet; training commenced immediately.
November 19: Advance base personnel dispatched to Singapore.
December 1: Advance detachment of 31 aircraft departed Toyohashi for Ayer Tawar Airfield, Malay Peninsula. Arrived 12th, continuing training. [Probably the place and date of the video]
1944
Late February: Commenced preparations for mine laying operations targeting British naval ports along the Bay of Bengal coast.
March 26: Enemy carrier fleet approaches Palau Islands. Advances to Kendari for interception. Bengal Bay mine-laying operation cancelled.
March 31: Following the previous day's Palau air raid, receives order to move to Davao airfield, Mindanao Island.
April 9: Advance destination changed from Davao to Degos airfield; movement to Degos completed on the 12th.
April 23: Following the commencement of the Hollandia ground battle the previous day, undertook three consecutive days of relief bombing with 10 aircraft (Operation Z1). Eight aircraft lost.
April 27: "Operation Z1" suspended; returned to Degos.
May 10: Left 12 aircraft at Degos and advanced to Sorong Airfield at the western tip of New Guinea Island.
May 11: Sorong Detachment bombed Hollandia with 8 aircraft; 5 reached target.
May 13: Six aircraft headed for the second Hollandia bombing but all turned back.
May 14: Hollandia relief operation cancelled. Sorong detachment returned to Degos.
May 17: "Operation A" ordered ["Operation A", a defensive strategy for the Mariana Islands area]; deployment preparations commenced.
May 27: "First Operation Kon" launched ["Operation Kon" was a three-phase Pacific War operation to support the Battle of Biak Island]. Advanced to Wasile Airfield, Halmahera Island.
May 29: 10 aircraft launched anti-ship attack; no results achieved, four aircraft lost.
May 31: Seven aircraft launched anti-ship attack, no results achieved, one aircraft lost.
June 3: Three aircraft bombed enemy camp on Owi Island. "First Operation Kon" suspended.
June 5: "Second Operation Kon" launched. Two aircraft conducted night bombing raid on Wakde Island (732nd Air Group's final sortie). Operational aircraft depleted.
July 10: Unit disbanded.
Unable to recover from incomplete training, the unit was committed in full to "Operation Kon" and annihilated. After disbandment, personnel were absorbed into the ground staff of the Hohoku Naval Air Group, which itself did not survive until the end of the war, disbanding in May 1945. Personnel undergoing training in Toyohashi were subsequently reassigned to units such as the newly formed 763rd Kokutai.
Two ships can be seen in the video. The first, is either cruiser Kitakami or Oi, Kuma-class light cruisers. In my opinion it's Oi.

Between mid December 1943 and March 26, the time period we believe the video was shot, both Kitakami and Oi are in the area, based in Singapore and are training at Lingga Islands just south of Singapore. So, time and place fit the whole set up of the video. Kitakami was hit by the submarine HMS Templar on 27 January 1944, and returned to Japan. So the video had to be shot either before January 1944 or the cruiser in the video is not Kitakami.
I believe the second ship seen in the video is the Cruiser Aoba. As with the other two cruisers, she is in the area, based in Singapore and spent some time training in the area. Aoba arrived at Singapore on December 24, 1943. Until January 23, she is ferrying troops to Malaya and Burma without either Oi or Kitakami. The only time she is with them is during the troop transport to Adamand Islands starting from January 23, when Kitakami is torpedoed. Personally, I don't think there was any time for training during that trip.
After that date Aoba is with Oi from March 1, 1944, during Operation "SA No. 1" that involves commerce raiding in the Indian Ocean. As we saw in the history of the 732Ku in "Late February: Commenced preparations for mine laying operations targeting British naval ports along the Bay of Bengal coast." The setting fits, the ships are going for a raid in the Indian Ocean and the 732Ku is training for missions in the same area. Therefore, my conclusion is that the most probable date for the video is some time between March 1 and 9, 1944, when the ships were on their way to the Indian Ocean and passed in front of Ayer Tawar; after that date, Aoba reaches Jakarta, Java Island on March 15.
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