Most likely by ground teams operating the spacecraft remotely. There isn’t much for humans to do in a spacecraft that can’t be done by automation, unless something goes wrong.
Most of them are sequenced. Around 6:10 the video goes through a series of buttons, most of which are called "Backup switch to do X" because when everything goes as planned, no button push is needed to perform the action.
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Since this launch was unmanned how were various events triggered?
Most likely by ground teams operating the spacecraft remotely. There isn’t much for humans to do in a spacecraft that can’t be done by automation, unless something goes wrong.
Most of them are sequenced. Around 6:10 the video goes through a series of buttons, most of which are called "Backup switch to do X" because when everything goes as planned, no button push is needed to perform the action.