When inserting into latest videos, use the constant for how far back we'll be reading to determine the TTL
Make the description on the view video page expand/collapse
Get commenting on videos working and lined up in the right spot on the view video page

- Also inlined some things I had previously moved to components (just compose view models instead of going full-blown components since they aren't actually used anywhere else)
- Also remove the knockout-amd-helpers component since it's not being used after the move to KO 3.2 components