Don't forget we've got a beginner here.
I could watch Donnie & Gaynor all day but they start in an advanced way.
In International style, with beginners in cha cha, to start, teachers often teach the man to take a beginning side step to the right on 1. This establishes the strong beat. But yes, after that the man steps forward with the left foot on 2. The 1s are the strong beat and will always be a side step for beginners with either foot. Donnie & Gaynor, of course, can start on any beat they feel like.
In International rumba I've often heard teachers tell students they do nothing on the 1. But that is not true. There is the hip settling action (for beginners something like standing in line at a supermarket and shifting weight from one foot to the other). After the hip settles the left foot goes forward on the 2. The difficulty is that beginners always want to do something on the 1. Counting it out loud worsens things as we naturally tend to want to move on the strong beat.
When my wife and I teach beginners for our Club we replace: 1, 2, 3, 4, 1, 2, 3, 4 with hip, 2, 3, 4, hip, 2, 3, 4 getting them to focus on settling the hip first and stepping later.
OB