Lots of vids of AndyMurray 4 years ago looking that inconsistent, and quite a few other 6.0's looking really scattered and weak, but then we find out they're better than that PARTICULAR vid shows.
Gotta give them the benefit of the doubt. They can hit 5.0 level shots at times, look somewhat balanced, and yes, impatient.
Not all 4.5's can hit 40 ball rallies, run like the wind, and move the ball side to side...nor all 5.5's.
A vid is a moment in time. It doesn't accurately represent the true skill level of the players.