I just noticed a feature of Viki TV (now Rakuten VIKI) that’s pretty neat. It has a learning mode that dual subtitles. I can watch a Japanese TV show, with both Japanese and English subtitles at the same time. A little control lets me have it automatically pause the video after each subtitle, with a repeat, back, forward function. Hovering the mouse over the subtitle can bring up a definition.
Maybe everyone already knew about that, but I used to watch viki a while back and never noticed.