Changmin’s mentioned at 44:00~44:08 and 47:20~47:32:

https://www.dailymotion.com/video/x2v1z1l

[Trans]

EXO on the radio. Who was the most recent person in the company that you’ve contacted?
Chen: TVXQ’s Changmin hyung, yesterday we had gone exercising together so we were in contact

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Credits:

Video by namja1to4,
Translation by @snxy : 1 & 2 (translator credits: from @_Heunnee)
Posted and Shared by TVXQ! Express