Redmercy presents a tutorial on Irelia, the Will of the Blades. At the beginning you’ll find the mandatory skills explanation and Summoner Spells recommendations. Afterwards it gets interesting as you’ll find plenty of examples on how to effectively lane with Irelia and contribute in teamfights. Moreover, there are a few examples of things you shouldn’t do like risky tower-dives.
You can find more videos by Redmercy at the MachinimaRealm Youtube Channel.
Warning: there’s some swearing in the gameplay section.