Thanks for the kind message. I am happy to report that this feature is progressing and is almost completed. However, this is with me spending most of my free time working on Jav-It. It is indeed a lot of work (especially with real-life obligations) so naturally I need to strike a good work/life balance, which is appropriate to the demand. Since you were the only one to reply to this feature, I might as well just give you a personal preview of what to expect:
As you may already know, searching for subtitles isn’t straight forward. They are largely created by random people, scattered across the internet on various forums, blogs, and web-postings (in many cases stuck behind paywalls, logins, links, and ads unique to that site). So in order to deal with this, I plan to release an add-on module which will include subtitle specific definitions (for identifying, matching, and obtaining subtitles). Like a virus scanner, you will need the latest definitions in order for Jav-It to be aware of the latest available subtitles. The first subtitle definition module will be released on itch.io, with subsequent updates added to Patreon as they come out. Hopefully this will allow me to strike a better balance between people who are satisfied with existing functionality and those who wish to see me spend ongoing time and support to expand Jav-It further!