These sites often belong to small businesses, local governments, or educational institutions that built a website two decades ago and saw no reason to change it. "If it isn't broken, don't fix it" applies heavily here. These servers churn on in the background, serving up .shtml files to a world that has largely moved on to .php , .asp , and dynamic API calls.
: This is the default file path for the live view interface of many Axis network cameras and video servers. inurl view index shtml 14