Another point to keep in mind is that some broadcast television shows simulcast in Spanish. Look for the SAP for second-audio program.
Second audio program - Wikipedia, the free encyclopedia So yes, Spanish speakers are watching the regular television channels too.
Additionally, Latinos are everywhere in the United States these days. Get used to it. This country was built on the backs of immigrants, and it is no different in the present day. Personally, I think we should all be learning Spanish, not the other way around; I'm a big fan of dual immersion programs for children. Linguistic isolationism is silly.