Haas5615, are you looking to be able to watch multiple streams on a single screen? If so, the only way I've figured out how to do multiple screens is with a BlackMagic MultiView device (https://www.blackmagicdesign.com/products/multiview). This isn't easy, simple, or cheap though. I have a MultiView 4 (which can do a 2x2 view) and because it's really a professional device, most of the connections require SDI, so I also had to buy multiple HDMI-to-SDI converters. I have multiple Tivo Minis that work fine with this setup.
I have tried to connect both a Roku Ultra and a Roku 3, but once video starts playing, it seems to fail the HDCP connection. This might be because I have older HDMI-to-SDI converters, although one of them is a BlackMagic HDMI-to-SDI Micro Converter. I was able to use an older AppleTV (A1427) without triggering the HDCP, so I currently use the Apple TV and 3 Tivo Minis to drive my 2x2 view.
If you ever find another solution, I'd love to hear about it.
