In 1999, Youle received a Bachelor of Design, majoring in typography, from Wellington Polytechnic Design School, New Zealand. His graduate show featured the words cultural blindness test in a series of diminishing letters like those on an optician's chart. His work incorporates clean lines, shapes, symbols and typography, repetition and recurrent motifs using a variety of materials and new technologies in 3D objects, sculpture, installation, graphite and ink drawings, photography, painting and tattooing.
Youle's works explore historical and current perceptions of Maori culture to question stereotypes and cultural traditions. For example, in Twelve Shades of Bullshit, silhouettes have been created in various shades of brown from illustrations of Maori drawn by early European explorers and artists. The work explores historical representations of Maori in New Zealand art and also comment on the various skin colours of contemporary Maori after 160 years of intermarriage.
Hongi Hika, 18th – 19th century Ngapuhi leader with tattooed face and tiki amulet
Since 2013, Youle has created a number of brightly coloured, stencil-like portraits. Originally based on existing photographs of deceased New Zealand artists, the series has expanded to include portraits of New Zealand and international characters living, historical and fictional. Among those depicted include Frances Hodgkins, Ralph Hotere, Len Lye, Colin McCahon, Damien Hirst, Captain James Cook, Michael King, Magic Johnson, E.T. and Michael Jackson. A catalogue illustrating a selection of the portraits was released by {Suite} Publishing in 2015. This catalogue accompanied Youle's solo presentation '9:54 | 3:49' with {Suite} Gallery at Sydney Contemporary 2015, where portraits of Stephen Hawking, Lindy Chamberlain and Sidney Nolan were exhibited.
Youle references the influence of other New Zealand artists in his work including Gordon Walters, Billy Apple, Shane Cotton, Peter Robinson, Ronnie van Hout and Michael Parekowhai, and Ricky Swallow of Australia.