Markovnikovs Rule - Electrophilic Addition favoured product

One of a series of videos extracted from a Flash project (unfinished) that will eventually cover all the Mechanisms met in the Advanced Chemistry course as taught in Scottish Schools. http://new.chemistry-teaching-resources.com/Mechanisms.html. This video follows on from the two videos showing Electrophilic Addition of water and hydrogen bromide. It explains how Markovnikov's Rule works in predicting and explaining which of the possible products will be favoured.