Unfortunately I don't have the movements' tempos - they weren't listed in the LR3 archive from which I recorded the work. When I uploaded it to UC I omitted the spoken introduction as I don't understand Latvian. I do however still have the introduction and the concluding remarks; I don't think the tempos are given, but here are the announcements and perhaps Maris can tell us if there is anything of interest:
http://www.mediafire.com/file/q0h8fqbl3jka4xg/Medins%252C_Jazeps_VC_intro_and_outro.mp3/file