Jerry has a laptop and he wants to know if he can connect his Apple TV to it so he can watch movies. Scott says that if the laptop is a Mac, then AirPlay with the AppleTV will make it easy. If it's a Windows laptop, then Miracast is what Windows supports. Both the laptop and TV have to support it, though.
Nick has a Samsung TV and he wants to cast videos from his computer or tablet. Leo says that most TVs support DNLA, which would enable him to stream to the TV. Samsung calls it "Samsung Link" or "All Share." He should Google the TV model and "DLNA" or "Miracast" and he will find out how he can do it. It may also be called "screen mirroring."
Most Windows devices and tablets will support DLNA. The Samsung Galaxy Note would be a good tablet choice, as are the Galaxy Tabs. Leo likes the Galaxy Tab S2. Any Bluetooth keyboard will work also, and the TV will support it.
David wants a good browser for his smart TV. Leo says don't! They're all terrible. Leo suggests going with DNLA or MiraCast, or even Chromecast and then cast the PC browser to his TV.
Chuck would like to connect his iPad to his TV wirelessly without anything in between. Leo says he can only connect to his TV with the Apple TV. It uses Airplay. On the Android side, his TV may support Android's DLNA or MiraCast without additional hardware.
Rick wants to know if he could use a Bluetooth receiver to stream music from his computer upstairs to his internet radio downstairs. Leo says probably not. Bluetooth is only 30' and it probably won't go through the floor. There would also be lag issues. That's why Leo uses Sonos to do this, and it works great because it uses DNLA.
Kevin got an Amazon Fire TV Stick for Christmas and he's having issues connecting to it using Miracast in Windows. Leo says that Miracast is a Wi-Fi technology that essentially sends HDMI over the air. Android 4.2 or newer has it built in. Windows 8.1 also natively supports it.