Issue with RTP Video over Network

[Syirrus]

Hello all,

ISSUE:
I've using baresip which uses creytiv/re & creytiv/rem as a dependency.
I'm unable to see video (audio works) when making a SIP call on differing networks using creytiv/re in baresip (LAN to LAN works [I get audio and video]; WAN to LAN doesn't work [only audio]).

With the same SIP configuration across the board; if replace baresip with other SIP clients (i.e. Microsip, GS wave, Linphone) it works from WAN to LAN or LAN to LAN (video and audio).

My SIP server has a public facing IP address and I'm not using a STUN or TURN server.

Any ideas?