Sriram N A

I'm wrestling with a similar issue now, on my LG UM73 55 4K Smart UHD TV. I enable "Media Streaming" on my PC, and stream the content using the built-in Photos & Videos app to the TV. Works fine for video content.

I find that .mkv streams with integrated captions work fine. But I am unable to get the subtitle option enabled for .mp4 video. I have made sure that the subtitle file is in the same folder as the video file, has the same name as the video (of course with .srt file extension) and that there are no dots or spaces in the video or subtitle file names. The subtitle file is ANSI encoding. Still does not work.

Any hints on how subtitles can be made to work for .mp4 files?

There are a few now (Zee5, Sony Liv etc.) - availability in the LG app store likely depends on region.