When combined, intitle webcam x5 searches for web pages whose title tag contains "webcam" and the identifier "x5." Usually, the search engine interprets this as intitle:webcam intitle:x5 (though the space triggers an implicit boolean AND).
In the cybersecurity world, the phrase is a common variation of a "Google Dork"—a specific search string used to find information that is not easily accessible via a standard query. intitle webcam x5