If you want soft subs as a separate track yes. Easiest way is to use FFMPEG and mov_text:
"c:\\ffmpeg.exe" -i "c:\\video.mp4 -i "c:\\video.srt" -c:v copy -c:a copy -c:s mov_text -metadata:s:s:0 language=eng -map 0:0 -map 0:1 -map 1:0 "c:\\VideoNew.mp4"
Change "c:\..." or drag and drop on cmd screen and it will add for you.