how to stream video

[Paddy]

Well, your 2014 iMac is fully wireless capable. Unplug the Ethernet cable, go to Network settings and give it a go, if you want to test it. A hardwired internet connection will always be faster than a wireless one; this would be to test your wireless network only.

[jchuzi]

Thanks, will do. Fortunately, download speed should not be a factor. With ethernet, I test at 235 Mbps.

[Xairbusdriver]

Both your iMac and any fairly recent mobile device have wireless built in. I do have an older iPad which I did not want to pay for cellular capability, but they have always had WiFi. I’m betting your Network System Pref has already “seen” there is a WiFi signal in the air. Any close neighbor will see that, also. So, if you don’t intend to use WiFi right now, turn it off or set a good password for it. There are other security details that we can discuss later.

[jchuzi]

Yes, I checked the Network pref pane and it does see the WiFi signal, but I haven't enabled it yet. My nearest neighbors are reasonably far away so that I don't think security will be an issue. I'm still undecided if I want to pursue streaming, so that will take some thought.

[Xairbusdriver]

What are the details (screenshot?) showing in Network? If it has a green dot, please also show the "Advanced" sheet. You can blur/block out any personally identifying info, of course.

My Pref shows how many "friends and neighbors" have WiFi. All but one are using passwords to prevent others from using their bandwidth.

There is also a "xfinitywifi" entry in that list. That is just the new, un-alphabetized name for Comcast (still a monopoly here, of course). They claim that it is for use by any guests who would want to connect to the web and that none of the bandwidth will count against my limits. I trust them about as far as... well, leaving politics out of this, I'll simply say I have disabled that.

[jchuzi]

I have Wi-Fi turned on but not connected. The screenshot shows the available networks.

[Xairbusdriver]

I think those are all from your modem/router. Page 9 of the Manual explains how those network names were created. No "neighbors". All have passwords, probably all the same, but the default ones are well known to hackers ("password", "none", etc.). The first thing I would suggest is that you enter a password yourself, whether you decide to use the WiFi functions or not. Instructions are in the "Using the Web User Interface" section starting on page 18. Of course, you should save that password in your password manager app.