This video demonstration from Jet Tools is very well done.  They cover how to turn a plate from start to finish and offer clear concise instruction.  This set of videos offer great tool techniques and some really good turning tips. I hope you find these videos as helpful and as informative as I did

PART 1 of 2 - How to Turn a Plate on a wood lathe

PART 2 of 2 - How to turn a plate on a wood lathe.