Box executes commands with higher priority first.
When diagnosing an upload queue using the /tools/accounts page, you'll see for example:
| commands_priority_60: 1056 | commands_priority_40: 7 | commands_priority_17: 1 | commands_priority_19: 1 | commands_priority_18: 1 | commands_priority_20: 10 | commands_total: 1076
| commands_priority_80: 1 | commands_priority_81: 1 | commands_total: 2
The priority is determined by both content type and importance.
|81||Thumbnails of Important Events|
|80||Thumbnails of Unimportant Events|
|70||Optional Croppings (hi-res) for analysis in the cloud.|
|60||Important motion video|
|40||Unimportant motion video|
|20||Unimportant non-motion video|
These priorities are adjusted by subtracting the ordinal value of the content within a particular Event so that the first video of important Events arrive first (at priority 80) even before subsequent videos in the same Event (at priority 79, 78,...).