I tried Language Reactor a couple of years ago and bounced off of it because of its absolutely atrocious support for traditional character Chinese. Its page literally says there is none on Netflix despite most their Chinese content being from Taiwan.

Migaku is flawed, but better. This tool seems like a much less polished version of Migaku or Lexirise with just a local media player and no ability to use it on YouTube, Netflix, Bilibili, etc.