I have been using the DVR plug-in to look at individual camera's. The BI plug-in only streams my 4 cameras in a composite image. I have not had any caching issues, but sometimes when using VeraMate over a cellular connection, the images can take a few minutes to update.
Vera 3, UI7 1.7.919, CT101 t-stat, Everspring motion detector, GE/Jasco switch, Leviton outlet, AeonLabs door sensor, Insteon garage control, Blue Iris, Sricam SP011, iPhone locator, APCUPSD, VeraMate, VeraAlerts, PLEG, House Modes, Countdown Timer, DVR, Virtual & Multi Switch, Weather, Sys. Mon.