Episode 6: Inner vs Outer HTML, Splat Areas, and Fastboot complexity

- Inner vs Outer HTML semantics 0:00
- Modifiers and Splattributes 6:00
  - Tweet mentioned by Ilya 10:45
  - Pre-RFC 13:10, 14:20
- Complexity added by Fastboot 14:40
  - Ryan Toronto's tweet about Fastboot workers 28:10