This CriticalPast page has a footage showing US Navy TBF bombers bombed some airfields during WWII. Although it says that Eiko was the airstrip being bombed, I am 100% certain that the airstrip in the clip from 01:08 to 01:56 was NOT Eiko. The Americans were in fact bombing Hokuto Airdrome (now in Changhwa County)!
You may want to compare the still image at 68 seconds (available under the Stills from this clip heading on the CriticalPast page) with the following photo, which shows the north end of the east runway of Hokuto Airdrome. (The reconnaissance photos I am using have several scratches on them. They are indicated by the yellow arrows so that you would not mistake them for roads.)

The still at 89 seconds covers roughly the same area as the next image:

The still at 114 seconds should look like the tilted version of the following image. If you watch the clip, you can actually see part of the west runway at 01:54.

I still need to figure out the airstrip in the first half of the clip, though.
這位豪哥先生的部落格上拍賣網站標了不少日治時期美軍轟炸台灣的資料照片。裡面有包含許多轟炸飛行場的照片。
http://tw.myblog.yahoo.com/k0933475481/archive?l=f&id=29&page=1
KP: 謝謝! 我也注意到了. 我寫這篇是因為CriticalPast網站的影片說明有誤, 另外也讓大家看到當時轟炸的動態畫面.