That video gives you the basics and should do you fine.
Have a look at the standard shotting patterns that I use for fishing a waggler on waters of around 6ft and less deep. They are standard shotting patterns for wagglers and will help you to cast without getting too many tangles and are quite sensitive as far as presenting your bait to a fish is concerned too.
On the right there is also a couple of shotting patterns to help you to combat any surface tow and keep your float fairly still by moving the bulk shot down into the undertow (which will be moving in the opposite direction to the surface tow) if that is a problem for you on the day.
If wind drag is still a problem the you can slide a couple more small shot further down so that they drag on the bottom.
Here’s a close up diagram to show how to arrange the shot around the base of your float which might be of help to you.
Of course the shot capacity of your float may be a bit more or a bit less and you will have to scale your shot up or down a little to suite, and a float marked 3bb would typically use 2bb plus a no.1 shot around the base of the float with a couple of no.6 and a no.8 shot further down.
Hope this is of some help to you
Keith