If you post 22 seconds from a 45 minute TV show[1], adding commentary on how it was in some way significant, I suspect you could make a reasonably strong case that it constitutes fair use (assuming the use of the footage is even challenged, which seems somewhat unlikely for a 22 second clip).
If you do it just to show the video, that's not fair use. That's just copying. If you do it to highlight something newsworthy that you're currently reporting on? That's fair use. That's exactly what the court ruling says, that it's fair use because something newsworthy was happening.
[1] "ABC used a tiny fraction of the footage—22 seconds from the original 45 minute Video", per https://arstechnica.com/wp-content/uploads/2017/02/Kanongata...