YouTube API Returns Wrong Channel's Videos

I am trying to retrieve videos from "nbaonespn" channel, and instead this API is giving me videos from other channels.

I tried this API call to Youtube API and was expecting to receive videos from "nbaonespn" channel.

https://www.googleapis.com/youtube/v3/search?key=*******&part=id&forUsername=nbaonespn&maxResults=3&order=date

However, I received videos from Fox news and a random channel name Willjum.

Here is the response:

{"kind": "youtube#searchListResponse","etag": "lIkxZx_k0uHgRMuqgEf9hPAnnPA","nextPageToken": "CAMQAA","regionCode": "US","pageInfo": {"totalResults": 1000000,"resultsPerPage": 3    },"items": [        {"kind": "youtube#searchResult","etag": "98v9BVyMoXcCr_-3UmFgOCHwFGE","id": {"kind": "youtube#video","videoId": "Vi6XFEoSrtY"            }        },        {"kind": "youtube#searchResult","etag": "KCo7llEWVz4_pWSSyPTdwCLERWw","id": {"kind": "youtube#video","videoId": "LcjB3uGPtvg"            }        },        {"kind": "youtube#searchResult","etag": "-nLmHAse_B2BmMKSHncQJqcYZV0","id": {"kind": "youtube#video","videoId": "4c1eqt8FVDE"            }        }    ]}