YAML's indentation rules are easy to break, and many APIs only accept JSON. ODS is an open standard that LibreOffice uses natively. YAML is at home in configuration files written by people; ODS is the usual choice for spreadsheets in open-source office suites.
A list of records becomes a table with one row per record. Nested keys turn into columns named like address.city, list items into columns like tags.0, and a key that only some records have leaves empty cells in the others. If the top level holds several lists of records, each becomes its own table, placed on its own sheet; a document that is a single object becomes one row.