Hi,
The reason video does not work is the MTP itself.
MTP does not have codec pass through, so they do not allow video to pass through but just the audio.
As per CUCM 10.x System Guide, under Video telephony"
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmsys/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100/CUCM_BK_SE5FCFB6_00_cucm-system-guide-100_chapter_0101011.html
" If an audio transcoder or MTP is inserted into a call, that call will be audio only" ** This line indicates for CUCM Software MTP
++ If hardware MTP ( IOS MTP ) allocated in the call, then the result will be with below conditions:
1. - If the MTP is allocated because of MTP Required check on trunks and gateways, then video streaming does not occur.
2. - If Unified Mobility requires MTP for DTMF detection, video is not available.
3. - If MTP is allocated due to transcoder and a TRP check on devices, trunks, and gateways, video is available
Regards,
Hitesh