New answers tagged subtitle
This is a temporary answer as I don't have a Mac at hand now. I have to test on a Mac, but the Windows version of 5kPlayer can do it very well; and it has a Mac version. Also, KMPlayer can also do it (also tested just in Windows for the moment) and it has a Mac version it seems (here - Mac Alpha Version: have yet to test too).
Wow I finally found a solution. I found https://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/subtitle_options and https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo so I tried a few things and found this worked. C:\Users\Chloe\Videos>"\Program Files\WinFF\ffmpeg.exe" -i russian_ark.mp4 -i russian_ark.vtt -vcodec copy -acodec copy -scodec ...
VTT subtitles are a feature of HTML5 which is why it is working in Chrome. iTunes doesn't support them. You will need to 3rd party utility to embed the subtitle as an additional track in the MP4 container. Normally I would recommend Subler for this but I don't believe it supports VTT subtitles yet. However, if you can convert the VTT file into SRT ...
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