The video clip features Ryunosuke Kamiki as he explains his role in the movie, Kimi No Na Wa (Your Name). There are also portions where he mentioned Makoto Shinkai's previous anime - Five Centimeters Per Second, The Garden of Words.
Kamiki was asked about his thoughts on the animator and replied:
Having seen his films in the past, I was wondering what he, who is talented to create such beautiful animations, would be like. When I met him in person, I saw his gentle and polite manners. He is precise with nuances that he would like to express, and I now respect him more for his smart and clever personality. [ source ]
The quote is from a separate interview, but he has the same reply to the question in the clip above. Plenty of scenes with the actor going on location. Certain portions also feature Shinkai at the Los Angeles Anime Expo as he goes on stage amidst rapturous applause.
Kamiki remains at the forefront of acting in Japan - aside from a "Rookie" won in the Japan Academy Prize, he is one of the few actors with a stronghold on both traditional acting and doing voices. Aside from Kimi no na Wa, he did the voice acting for the main characters in Mamoru Hosoda's Summer Wars and Studio Ghibli's The Secret World of Arrietty.
The video above was also used to feature Kamiki from a Tumblr account, Kamikiism.
I know that Kamiki worked in the movie/drama industry at a very young age, so reading his reactions and opinions about it, including his voice acting is 'normally' impressive, but still you have to credit the actor for his knowledge:
I believe that animation and live-action films are clearly different. As for live-action films, your body is on camera, which makes it possible for you to express by being there. However, in the case of animation making, you can’t move around freely, because you want to avoid unnecessary noise. You need to express exactly what is already there with your voice, which includes moments of silence and facial expressions. On the contrary, in both Kimi no Na wa and 5 Centimeters per Second, you frequently see the motions and expressions just like those in live-action films. So, I consider this film as live-action-style animation. It almost intentionally tries not to convey the meaning. [ source ]