title: parse youtube ISO8601 duration format
title: parse youtube ISO8601 duration format

Former-commit-id: 22e3376881109b9da34dc01d9fb52aaefa1447cb [formerly 34e0f9ec9ce53ad60a5c4e40659b14804c2c3132]
Former-commit-id: 3bf6aa7c41e7d77caf649af0e4bb399a7b34983a
torhve/ivar2,torhve/ivar2,haste/ivar2,torhve/ivar2