Cannot associate an asset with blob - azure

Question

I am trying to upload a video to azure media services, but once i create the asset and then upload the video to blob with the SAS url, the asset does not contain the video.
main.go
func main() {
assetName := "sample1"
asset, err := azureMedia.CreateAsset(assetName)
if err != nil {
panic(err)
}
log.Println("Asset Name: ", *asset.Name)
sasURL, err := azureMedia.GetStorageURLForAsset(assetName)
if err != nil {
panic(err)
}
log.Println(sasURL)
err = storage.UploadToBlobFromSASUrl(sasURL)
if err != nil {
panic(err)
}
return
}
media_services.go
func CreateAsset(assetName string) (*media.Asset, error) {
asset, err := assetsClient.CreateOrUpdate(context.Background(), resourceGroupName, accountName, assetName, media.Asset{})
if err != nil {
panic(err)
}
return &asset, nil
}
func GetStorageURLForAsset(assetName string) (string, error) {
result, err := assetsClient.ListContainerSas(context.Background(), resourceGroupName, accountName, assetName, media.ListContainerSasInput{
ExpiryTime: &date.Time{Time: time.Now().Add(time.Hour * 4).UTC()},
Permissions: media.ReadWrite,
})
if err != nil {
panic(err)
}
return (*result.AssetContainerSasUrls)[0], nil
}
storage.go
func UploadToBlobFromSASUrl(sasUrl string) error {
// When someone receives the URL, they access the SAS-protected resource with code like this:
u, err := url.Parse(sasUrl)
if err != nil {
panic(err)
}
containerURL := azblob.NewContainerURL(*u, azblob.NewPipeline(azblob.NewAnonymousCredential(), azblob.PipelineOptions{}))
blockBlobUrl := containerURL.NewBlockBlobURL("sample.mp4")
video, err := os.Open("./sample_videos/sample1.mp4")
if err != nil {
panic(err)
}
resp, err := blockBlobUrl.Upload(context.Background(), video, azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
if err != nil {
panic(err)
}
buf := new(bytes.Buffer)
_, err = buf.ReadFrom(resp.Response().Body)
if err != nil {
panic(err)
}
newStr := buf.String()
log.Println(resp.Status(), resp.StatusCode(), newStr)
return nil
}
From what i understood from the docs, the asset should be present and be associated with the video blob, but when i tried to encode it, it says there is no file associated with the asset.
Is there something I'm missing? Any help is appreciated