More stretching tips, how to train for splits, with English subtitles:
https://www.youtube.com/watch?v=MMLxN30NECM
Fight Science Kick Test (Capoeira, Karate, Muaythai & Taekwondo):
https://www.youtube.com/watch?v=Gw4EoWi5QSM
This is an interesting Ninjutsu channel with English subtitles...