Some foreign language videos on youtube have English subtitles

On my laptop, I can watch a Youtube Vid with subtitles (clicking CC). I haven't been able to see that same video on my Iphone 4 with the subtitles showing.
Things I've tried:
1. Yourtube streaming, saving, saving to Ipod and viewing (with Ipod settings...captioning on).

2. Mitube saving

Any ideas?