Do a Google search for "NFL stream", there are plenty of links that take you to the same handful of sites.
I've been streaming since 2013. Here's the deal. You will get several choices of streams. Each comes with 5 - 8 links. Most link you to the same 3 or so actual stream sources. The misdirection gets tricky to navigate. Some links open with video half covered by ads with fake "x"s that are actually links to other ads. Other times, you get pages that come with audio tracks announcing that there is a virus on your computer that offer no "x" option to kill the page, so you have to ctrl+alt+del to get out of the page. In no case has it ever caused an actual virus on my computer, but there's a touch to navigating the streams, and it is a frustrating endeavor.
You usually get an unpredictable selection of sources. Often, it's a European broadcast with feed of the American telecast with European commercials, commentary from British annalists, periods of dead air, or extended videos of JJ Watt screaming repeatedly.
Sometimes the game feed is pretty consistent with little interruption. There are always freezes in the stream, but during most games you lose no game action after freeze. Sometimes the stream moves really slow and you miss game action during the buffering process. This happens 2 - 3 times each year. Today was one of those days, and I missed the James White touchdown because of stream issues.