I can't watch the video with subtitles on iphone. Once I play the video, it becomes full screen, and the subtitle is gone.
Thank you for this important report, dahliakuo. I don't have an iphone (and don't have this issue on my android phone) so what follows is just based on analogy, not experience: if the issue occurs with Safari, can you try another iPhone-compatible browser? If that does not work, maybe ask on the iPhone support forum.