I think what you need is media_upload_{$type}
hook.
Here’s the documentation for it: https://developer.wordpress.org/reference/hooks/media_upload_type/
There’s also an easier way to achieve a similar result, by using the filter wp_handle_upload
which is really straightforward.
Here’s the doc about it: https://developer.wordpress.org/reference/hooks/wp_handle_upload/
If you could provide more details about the result you want to achieve, I’ll try my best to help you with some more specific code!
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