interesting, the Salmon I have caught has not been as colorful- I mostly fish in the rivers though
edit: it looks like that vid had some steelhead (trout) mixed in? This is more like what I have seen, but the color is even more "dulled" in person https://www.youtube.com/watch?v=e09UmeqAd4g
https://www.youtube.com/watch?v=Cvvshpw4FxM
Check at 6 minutes into the video.