Ok, so I have had a good listen to this. First thing of note, your dipstick is not pushed all the way home.
The sewing machine sound are the injectors and totally normal but if you listen on, you can hear like a washing machine on full spin type of sound which suggest chain or more so chain guide. Its common for the top half of the nylon chain guide to snap off and sit in the bottom of the front cover.
I don't know which part of the country you are in but I would take it to an expert so they can have a proper listen.
Not trying to scare you, its difficult to determine from an audio clip but I would be putting a listening probe on the front timing case around here (directly below the alternator):
View attachment 127000