Just remember a few months ago I shared a live cam also from Virtual Railfan of the Cajon Pass another route the Southwest Chief takes between Los Angeles and Chicago. On occasion you can see that cam on Virtual Railfan's YouTube, however, it might be seen as a cam of the week when it is up. Also bear in mind that with many of these cams you won't only see Amtrak trains you will often see freight trains also.
It's time to look into a subscription to this very exciting site to see all the rail cams they offer beyond the live cams we see on YouTube. Sometimes I wish I can request some cams in urban areas. Perhaps there are some places in the Chicago area where Virtual Railfan can figure out how to place some live cams.
As always feel free to check out my Railcam page. As I wrote this I see it's raining and storming in LaPlata, Missouri.