Anime:
https://anidb.net/anime/4773
https://myanimelist.net/anime/1694/
I do no own anything in this video was uploaded for non-profit educational purposes. All rights belong to their respective copyright holders.
About:
A special feature included with the first volume of the iDOLM@STER XENOGLOSSIA DVD. Presented in the form of a radio show hosted by Haruka and Yayoi, it features post-recording comments from the seiyuu regarding their characters as well as some clips in the studio.
All major seiyuu are interviewed which includes: Iguchi Yuka as Amami Haruka, Horie Yui as Hagiwara Yukiho, Tamura Yukari as Minase Iori and Kitamura Eri as Kikuchi Makoto. Ono Daisuke eats onigiri in this one.
JP:
"また、DVD1巻の初回特典としてキャストのコメントやアフレコ風景を収録したDVD「アイドルマスターを探せ！」が付属した"
Uploader comments:
This special was downloaded from a Japanese DVD rip uploaded online my Moozzi2, which unfortunately featured an incorrect aspect ratio and horribly inaccurate colors. I eye-balled color-correction by de-saturating the colors to match the original television anime's, then resized the video to a more accurate 4:3 aspect ration with a resolution of 768x576.
An interview with series producer Furusato Naotake can be seen here: https://www.youtube.com/watch?v=qI9aBdu6XGI