From JoJo’s tweet on 23 August, 2017:
＼DORARARARARARARAAAA！／
Yamazaki Kento-san (Higashikata Josuke) x Ono Yuuki-san (TV Anime version Higashikata Josuke)
✨ W-Josuke’s dream appearance ✨ Full video of the event！→
youtu.be/MpuAE2MBtMY
#jojomovie
And the full video as posted on Warner Bros official youtube:
Thank you so much for sharing the video. Appreciated much.