* Use ISO 639 for language (*en*, *es*, *fr*...)
* Tools (`import-videos`...) need the language ISO639 code instead of a number
* API (`upload`, `update`, `list`...) need/return the language ISO639 code instead of a number
* Use ISO 639 for language (*en*, *es*, *fr*...)
* Tools (`import-videos`...) need the language ISO639 code instead of a number
* API (`upload`, `update`, `list`...) need/return the language ISO639 code instead of a number