Greasy Fork is available in English.
Allows you to download subtitles from Amazon Video
< Amazon Video - subtitle downloaderについてのフィードバック
Yes, my code is fine, it's Tampermonkey that's faulty. So open a new issue in Tampermonkey's GitHub repository.
Works for me in Tampermonkey BETA 4.16.6159
https://chrome.google.com/webstore/detail/tampermonkey-beta/gcalenpjmijncebpfijmoaglllgpjagf
Good to see they are finally fixing it. Too bad it's still in beta.
4.16.6160 came out and script works as it should.
Tampermonkey 4.16 for Chrome is final => all fine
Currently, this script doesn't work well under the latest version of Tampermonkey.
But it works fine under Violetmonkey ( https://chrome.google.com/webstore/detail/jinjaccalgkegednnccohejagnlnfdag ) and Google Chrome.
Try it.