You're wrong!
And here's why.
The fact that you are piloting it from the ground is irrelevant, a full size pilot in the same situation would do the same as you have done, and in that situation I would also do the same as you whether I was flying a model or in the full-size..
But... you are not doing a turn as discussed here. you are doing a deception for the sake of the ground based judges. You are off line and want to turn to regain the line but don't want it to be obvious to the judges, which it would be if you banked for a proper turn. So you do a "flat" or "control-line turn" yawing the plane out of balanced flight and holding the wings level. That's an aerobatic manoeuvre in its own right, it is not a proper turn and you would never normally do a turn like that. It's not a turn, it's a deception for the ground based judges. It's a result of the judges' rules, if they changed the rules not to downgrade you for it, you would bank.

On a separate point, the misunderstanding of rudder and side winds amongst model fliers is stupefying. One day at my model club a full-size Piper Warrior flew directly overhead in a cross wind. I knew that because it was not pointing exactly the same way it was travelling, it appeared to be crabbing. The Chairman of our club looked at it and announced that the pilot must be having to hold on a lot of rudder against that crosswind!!! The Chairman of the club, a chap who had taught, or rather mis-taught, lots of innocent beginners with such rubbish. he seriously believed the pilot was holding in rudder all the time!!!! And since the beginners have been told it by no less than the Chairman, the chap who "taught" them to fly, they believe it like a religion and you just can't do anything to show them it is wrong. Sadly every model club has lots of instructors who haven't a clue, like the one in the youtube video, but they pass on their rubbish and the beginners cling to it so hard they just can't be shown it is wrong. They will tell you if you hold on rudder you can do a flat turn, but that magically if you hold on rudder during approach to landing the model will go straight and they just can't accept they are contradicting themselves, they think that planes have some magical knowledge that they are coming in to land rather than just flying by and that somehow the plane's reactions to the rudder control magically changes. They will argue quite vehemently that you hold on rudder into a crosswind when on approach to land, and model clubs and internet forums are full of that nonsense which is clung to like a cult religion.

As to those who claim "models fly different to full-size" what tosh! Every model I have flown has handled the same way as every full-size I have flown. How does an aeroplane know it is a "model" or "full-size"? Answer - it doesn't!!! There are full size planes so small and models so big that the models are bigger than the full-size. But if models fly differently then the model which is bigger than the full size will fly like a model, differently to the full-sze that is smaller! Tell me, at what point does an aeroplane know it is a model so that it knows to use some mythical set of handling laws that apply only if it is a model even if it is bigger than a full-size? There is no such thing. Size matters due to things like reynolds numbers, mass, wing loadings but at no time does a plane ever know that it is a model or full size, it has no way of knowing, there is no such distinction in the laws of physics or the rules for piloting a plane, it is word applied purely by humans to denote the plane's use