Symptom:
Issue with one-way or no way video on CME video phone 89XX

9951 phone --> SIP--> CUCM-->SIP-->CUBE-->SIP-->CUCME-->SCCP--> 8945 phone

Here below the releases and firmwares used on each equipment.

SITE A

  CUCM  8.6.2.22900-9
  phone 9951 firmware sip9951.9-3-1-33
  phone 8945 firmware SCCP8941_8945.9-3-2-11
  CUBE c2900-universalk9-mz.SPA.152-3.T3.bin


SITEB

 CUCME  9.1   IOS: c2900-universalk9-mz.SPA.153-1.T1.bin
 Phone 8945 firmware SCCP894x.9-2-3-5

When the 9951 phone on site A calls the 8945 phone on site B, the video won't be displayed on the 8945 phone on site B.  But the 9951 phone will display the video.

Now if if we change the scenario like this:

8945 phone --> SCCP--> CUCM-->SIP-->CUBE-->SIP-->CUCME-->SCCP--> 8945 phone
or 
9951 phone --> SIP--> CUCM-->SIP-->CUBE-->SIP-->CUCM (not CUCME)-->SCCP--> 8945 phone

The video will be displayed on both phones.

Conditions:
There are 2 scenarios tested out.

Scenario 1 : When 9951 phone on CUCM calls 8941 on CME, One way video happens.
call flow : 9951 ---SIP --- CUCM ---SIP --- CME ----SCCP ---8941.
Result : One way video. 

Scenario 2: When 8941 phone on CME calls 9951 on CUCM, no way video.
Call flow: 8941 -SCCP --- CME ----SIP ---- CUCM ---SIP ---9951 .
Result: No way Video.