Support and configurations for Yealink VP530 and other softphones

[athbot]

Hello, we recently purchased a yealink VP530 and we are trying to configure it with an elastix server in order to make video calls with other softphones on android (Bria , Zoiper) and for PC i tried Ekiga, and i'll be soon trying the other two for pc. I have configured the sip_general_additional.conf in my elastix server with
videosupport=yes
maxcallbitrate=384
allow=h261
allow=h263
allow=h263p
allow=h264
and i have bought the licenses for Bria and Zoiper for their Video features.I have tried both Bria and Zoiper and whenever i make a call to or from the softphone the screen from the Yealink where the video from the softphone should be there is always black although voice is fine.Is there a configuration template i should follow for the VP530? Is there a compatibility list and/or configuration for the softphones , what should i use?

Thanks in advance for any help