I loved the animated PNGs! I think they've added a unique flavor to the whole experience.
And for some reason, it didn't ever occur to me that I could just rewind the video! It's so strange - the buttons are right there, and I just never thought to use them, complaining about subtitles' speed instead. But it makes total sense, and it is an interesting feature, thank you for bringing it to my attention.
P.S.: English is not my first language either, so don't sweat about it :)