How's your LAN network? High bit rate files require a healthy network to stream without fuss..

1. Rename subtitle to match video filename and place within the same folder. If you have subtitles enabled in settings, Kodi automatically selects this..
2. During playback.... Select the Audio-Settings icon, then "Browse for subtitles"... This allows you to browse the filesystem for the file needed to display the subtitles.

For future reference, there is a dedicated Kodi thread... Kodi related topics belong there...

50% discount... there lots of such boxes on sale now.

becos it's 1/8gb, kikat, specs about 2 yrs old. (a current one will be 2/16 lollipop or marhsmallow).

but it will work, likely a bit slow.

can buy as entry level, learn, nothing much to lose.

the presinstalled apps as advertised looks a lot, most popular.

but will be out of date, e.g. kodi is listed as helix 14.2 when it's jarvis 16.1 now.

u just need to update/upgrade the apps, and the firmware.
the shows must be very unique. what are they?

usually it's the other way round - have own video and get subs on kodi.

or find the video and the subs all in kodi.