For CelloBello-approved subtitles in various languages via dotsub:

Desktop:

1. On bottom right of video player, click CC icon
2. Click Settings icon
3. Click Subtitles (CC)
4. Choose language (via dotsub)

Mobile:

1. On top right of video player, click ⋮ icon
2. Click Captions
3. Choose language (via dotsub)