Originally Posted by
Tall Paul:
“Another fast salsa tune:
https://youtu.be/9vMh9f41pqE”
I think you may be confusing the speed of the melody with the speed of the beat

I have clicked 3 of the 4 you have posted and none of them were suitable for salsa. All too slow to be really good salsa tunes. (even leaving aside the lack of Latin American flavour)
Melody doesn't feel like the right word for this track but what you have is quite a slow rhythm overlaid with a lot of busy top lay so it gives the impression of being quick when actually it really isn't and not fast enough for good salsa.
You need to listen down through the layers and find the basic drum (usually) beat. If you compare to the list I posted there is one in there that is the opposite.
https://www.youtube.com/watch?v=BUhKDHCYS98. Ignore the intro and wait for the percussion to start. It's quick. It is a salsa romantica number and on first hearing it sounds slow because it has a slow romantic melody. But get under that and it has quite a fast beat. Its like a pulse in the music and tha'ts the bit you pick out to dance salsa to.