Here are some links to an assortment of racing and training videos on YouTube, which may be of interest:

Michael McNamara rig tuning presentation from RYA Dinghy Show 2016:-

Michael McNamara’s golden rules on how to sail fast:-

Michael McNamara on water tips from a training session in Denmark:-

More from the training weekend in Denmark:-

North Sails Wayfarer trim tips from a training session at Parkstone YC:-

Wayfarer racing from Denmark:-

North American Midwinters:-