99% of the time I try to use this tool recently it appears to do nothing when hitting the extract button. I've tried Chrome, Edge and Firefox. When using Firefox I noticed this error in the console after hitting extract:
"Uncaught (in promise) DOMException: The fetching process for the media resource was aborted by the user agent at the user's request. "
The videos I'm trying to extract from use h265 encoding and they play just fine in the browser.
Hopefully this can be fixed because this is a great tool!