I don't know how reliable or verifiable this site is but I got curious about public live cams at the Tijuana border. I found this one: https://www.bordertraffic.com/California-Baja/San-Ysidro-Tijuana/Pedestrian.aspx
BorderTraffic.com.
More curious though is that all of the live cams (that are activated) are on a 5-10 second loop. Same footage over and over. Are we not supposed to see something?