I'm running Safari 10.1 and have the Flash plugin configured to Ask before it runs (meaning it won't run until I grant it permission). Your watch.spectrum.net site for live and on-demand TV is incompatible with this security setting and simply fails to work with no feedback at all (just a black screen, no error message, nothing helpful). The Flash plugin needs to be configured to On so it always runs without being prompted. This is a security downgrade (literally: I have to into Safari Prefences -> Security -> Plug-in Settings -> Adobe Flash Player and create a security exception for your site).
Please fix the security issue with Flash permissions. Or better yet, deliver native HTML5 video content like the rest of the internet so maybe I could watch this directly on my AppleTV?
As a web programmer who has used Flash, it is 100% a spectrum.net issue. They're not going through a proper set of callbacks to authorize the plugin and are instead assuming it has permissions. That's terrible coding that leads to a terrible user experince. But what I do know? I only get paid for this stuff. lol