Be open and ask. Speaking with the head coach about a series of classes I will give to swimmers at various levels and their parents and guardians on healthy eating and hydration for sport I pointed out that the videos he'd put up on the club website weren't great: it was hard to hear what the young nutritionists from Swim Englands were saying because they had loud music over what the were saying ... to the point that it drowned the out. He had put them up there without looking at them.
I have by now watch close to 16 nutrition for young athlete videos from the US and UK: I have found a couple that will work better.
I'm still at the exploration stage with this. I am still watching, reading, having ideas ... finding that may others have thought along the same way already - which is reassuring. I'm not going for originality, rather effectiveness, appropriateness and simple enough for me to be able to deliver it and field questions.
Everything is orientating towards the 'Plate of Food' as a way to visualise what should be on the plate, in what portions too.