Usage keys (e.g. as video identifiers) may be difficult for researchers to process.
We're trying to figure out whether we want to explode out the usage keys into more manageable subfields in events coming from mobile devices.
, How does the Objective C Mobile App currently introspect Usage Keys?
For now, emit Usage Key when needed as event.usage_key (is this the standard name for this field?)
Discuss whether to & when to explode out the key as add'l fields on the event