I guess you did not like my answer on the other thread. Looking at my two RB260 switches, there is no indication of LAG support on either version. As for RTSP, the older RB260GS with SwitchOS version 1.6 does not have any indication of RTSP support, However the newer CSS106-5G-1S with SwitchOS version 2.13 does have RTSP support. There is a RTSP tab with the settings.
RB4011iGS+, RB750Gr3, RB750r2, CRS326-24G-2S (in SwitchOS), CSS326-24G-2S, CSS106-5G-1S, RB260GS
Not sure if I beat them in submission, or they beat me into submission
Warning: I know enough to be dangerous...