So here’s the problem I’m having. I want to display gameplay from a CRT with zero lag and also play that on a projector with possibly with some lag. I wanted to confirm if RCA splitters like the following would cause lag to the CRTs and projectors.

http://www.ebay.com/itm/4x-RCA-Y-Splitter-AV-Audio-Video-Plug-Converter-1-Male-to-2-Female-Cable-Adapter-/130690358547?pt=US_Audio_Cables_Adapters&hash=item1e6dc09d13#ht_4076wt_1037

No lag since you’re just splitting an analog signal out, but you can likely expect some signal degradation.