I am attempting to connect two webcams (Logitech C-920 & C-922) to my Dell XPS13 (i7 Win-10) laptop via USB to record music practice sessions via OBS Studio.  This machine only has two USB-A ports (one USB-C); I need access to at least three USB-A ports (2 cameras + an audio interface).  Therefore, I would like to connect the webcams to a 4-port USB hub.  However, when doing so I am only able to view one camera at time; the other remains blank. 

I disabled the laptop’s onboard camera thinking this may help but still only one camera at a time.  If I plug one camera into the hub and one directly into a port on the laptop it works fine.  If I plug both cameras directly into USB ports on the laptop it also works fine.  

I purchased two 4-port externally powered USB hubs; a USB-A to USB-A and a USB-C to USB-A.  Both of them only displayed one webcam at a time.  I could not view both simultaneously.

In the past the 4-port hub worked fine with my old Win-7 i5 HP Pavilion laptop.  I suspected a newer, faster, more powerful, etc. machine would have worked better not worse.  I have read elsewhere where some have had as many as six webcams running simultaneously.  I understand trying to connect numerous webcams could be a problem but I would think simply hooking up two to a newer computer would not be an issue.    

Any suggestions would be appreciated.