@paok1970,
It could be, but it's acceptable as it is. The Liverpool players sounds a bit stilted, almost like it's the name of a band. Liverpool players sounds more natural, and it's not like the youtube viewers don't know what's happening.
You'd have to be living under a rock not to know Liverpool beat Spurs to win the Champions League yesterday.
Or an American with their peculiar sports that nobody else is interested in.