DIY Marmite?

Kiwis love (or hate) their Marmite (a fermented yeast spread); however, earthquake damage has had the Christchurch factory (the sole producer of NZ Marmite) down for repairs and new stocks of this beloved, dark, tarry, salty substance will not be back on store shelves until July.  Hence, this DIY Marmite video that may be of interest to you as you start to grasp Kiwi culture. 
- Meryl