I listened and compared the video of youtube with my sources.
This medley was taken from Silver Box Set of 8 LPīs "Elvis Aron Presley" (CPL8 3699) of 1980 or CD set (67455-2) of 1998. And appear under the name "The Concert Years" recorded between may and june 1975.
In LP box set is 8th LP, side B, track 6. In CD box is 4th CD, track 22.
This version of "Mistery Train / Tiger Man" was recorded in june 7, 1975, at Hirsh Coliseum, Shreveport, Louisiana.