Update file 03biomaterial.md

docs/development/03biomaterial.md

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 ## **MAKING COMPOST FROM FLOWERS**
 
+<iframe width="1000" height="400" src="https://www.youtube.com/embed/2wFQ-z_2-6g?si=rsbmuiuZLQ01iCNL" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
 ## **GELATIN**
 
 ## **STARCH**
@@ -18,7 +20,7 @@
 **MATERIALS NEEDES**: 
  
 
- 
+
    1. Plant fibers   
    2. Blender or food processor
    3. Fine mesh screen or mold and deckle