I've noticed that the V3 API returns a 400 error for some values of topicId, while it generally works fine.
E.g.
https://www.googleapis.com/youtube/v3/search?part=snippet&maxResults=10&type=video&key={API-KEY}&topicId=%2Fm%2F0k_qlf
Error 400: Invalid combination of search filters and/or restrictions.
https://www.googleapis.com/youtube/v3/search?part=snippet&maxResults=10&type=video&key={API-KEY}&topicId=%2Fm%2F01vrncs
Works fine
Anything I've done wrong, or is that an error in the API itself?
Thanks