@Ed Boyer ,
Perhaps it's my old brain but it's not clear to me what you have and what you're wanting to accomplish....a sketch would help (at least this old brain).
I say that for several reasons:
1) Wireless is to be avoided whenever possible when it comes to bandwidth-intensive applications such as video streaming. In addition, it's reliability (or lack thereof) is also a factor when we are talking video surveillance.
2) Cascading routers especially when connected LAN to WAN causing a double NAT is not only unnecessary (likely) but can add slight undesirable delay in the process. Only one router needs to be the DHCP server and handing out IP's to the LAN. The second (downstream) router could have its DHCP disabled, assigned a static IP and connected via its LAN port and therefore becomes a switch with a wireless access point, providing additional Wi-Fi in the vicinity of its installation.
3) A wireless layer 2 transparent bridge between 2 LAN segments can be a workable solution in SOME cases. I'm talking 2 Ubiquiti NanoStation AC Loco 5GHz radios configured as AP and Station using AirMax and WDS enabled. This is an additional expense (about $50 apiece) and is generally used outdoors to connect remote segments and/or provide air-gap interconnection in areas with extreme lightning issues. It could be used indoors and could work well in many cases if using cable is not an option.