English: Engineers with Exploration Ground Systems and Jacobs prepare to lift and place the core stage of the Space Launch System rocket for the Artemis I mission on the mobile launcher and in-between the already assembled twin rocket boosters.

File is trimmed according to my personal preference of what parts are interesting. I attempted to upload a full transcode, but Commons gave long timeouts and errors, it was likely too big. Here is that intermediary file: [1]

Here are the exact commands to create this trimmed file. It downloads the file, converts to VP9 with two-pass encoding at CRF 20, trims out two sections of actions, then concatenates them together.

wget https://images-assets.nasa.gov/video/KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141/KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.mp4 && ffmpeg -i KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.mp4 -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 1 -row-mt 1 -an -f webm -y /dev/null && ffmpeg -i KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.mp4 -c:v libvpx-vp9 -b:v 0 -crf 20 -pass 2 -row-mt 1 -an KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.webm && ffmpeg -ss 00:01:27.500 -i /Users/leijurv/Downloads/KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.webm -t 17 -c copy trim1.webm && ffmpeg -ss 00:01:56.000 -i /Users/leijurv/Downloads/KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig.webm -t 22 -c copy trim2.webm && ffmpeg -f concat -safe 0 -i <(echo "file '/Users/leijurv/Downloads/trim1.webm'\nfile '/Users/leijurv/Downloads/trim2.webm'") -c copy KSC-20210610-MH-FMX01-0001-Artemis_I_SLS_Core_Stage_Lift_Ops_TIMELAPSE-3278141\~orig-trimmed.webm