Hey @lane,
It appears that endpoint only returns data in one month increments.
In order to return all the data from the past 6 months you will need to make the requests in the following ways:
https://api.zoom.us/v2/users/{userId}/recordings?to=2020-03-19&from=2020-02-19
https://api.zoom.us/v2/users/{userId}/recordings?to=2020-02-19&from=2020-01-19
https://api.zoom.us/v2/users/{userId}/recordings?to=2020-01-19&from=2019-12-19
And so on…
Let me know if that works!
Thanks,
Tommy