On YT, we can see a live stream from ISS.
What is the delay here (given you have a modern high speed internet access)?
I took a bunch of comparison screen shots over 30min of the two YouTube "live" channels in parallel, and I've made a little side-by-side montage of the two.
The alternate, non-NASA site in question is constantly switching to old footage from either previous passes of a nearby area or geographically unrelated areas.
While the site is called "NASA Live: Earth From Space - Nasa Live Stream | ISS LIVE FEED", it is definitely not that at all, except once in a while.
The site could be considered to have at least one foot in "sham territory" or be "borderline sham". It only appears that it might be live when the little white sign that says 'WWW.ISS-LIVE.COM` is on:
which isn't much of the time.
The "trip" shown below is from about
2018-12-06 23:54:00 UTC to
2018-12-07 00:35:00 UTC and passes over Australia diagonally northward and over the pacific towards Alaska/Canada, but sunset gets there first. Here's a screen shot of N2YO about half way through around