Could not get n-parameter function

[Franknxtn]

I am using below implementation to retrieve VideoInfosWithDownloadFormatsResponse:

func getVideoDownloadFormats(videoID: String) async {
        let YTM = YouTubeModel()
        let dataParameters: [HeadersList.AddQueryInfo.ContentTypes : String] = [
            .query: videoID]
        do {
            let response = try await VideoInfosWithDownloadFormatsResponse.sendThrowingRequest(
                youtubeModel: YTM,
                data: dataParameters
            )
            
            for format in response.downloadFormats {
                print("URL: \(format.url?.absoluteString ?? "nil"), Quality: \(format.mimeType)")
            }
        } catch {
            print("❌ Failed to fetch formats: \(error)")
        }
    }

but it fails with below error:

❌ Failed to fetch formats: ResponseError(step: YouTubeKit.VideoInfosWithDownloadFormatsResponse.ResponseError.StepType.scrapPlayer, reason: "Could not get n-parameter function.")

Am i doing it right?

[b5i]

Hello, yes you did it alright, the reason of the fail is that YouTube changes their "n-parameter" function all the time, including its "shape", making it more difficult to extract. As I don't really have the time to adapt the code every time, this function can fail as you've seen.
I will try to fix this issue soon.
In the meantime, I recommend that you use the base HLS stream that contains audio-only and video tracks (you need to extract them manually in turn.m3u8).