The video (in 4K!) was captured by one of the twelve DJI Osmo Action 6 cameras installed on the first stage of Zhuque-3 Y2 rocket.
The cameras are regular consumer products. They were encapsuled in a special case attached on the surface of the stage body. Videos were exported from the SD card after the first stage was recovered.
submitted by /u/hextreme2007[link] [comments]