How to add a Video to a specific YouTube Playlist?

I'm using YouTube Data Api v3 in order to retrieve the first searched video id by typing a title into a textbox.I'm doing it with this code:

Imports SystemImports System.Collections.GenericImports System.IOImports System.ReflectionImports System.ThreadingImports System.Threading.TasksImports Google.Apis.Auth.OAuth2Imports Google.Apis.ServicesImports Google.Apis.UploadImports Google.Apis.Util.StoreImports Google.Apis.YouTube.v3Imports Google.Apis.YouTube.v3.DataPublic Class Form1    Private Async Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click        Try            Await Run()        Catch ex As AggregateException            For Each inner In ex.InnerExceptions                MsgBox("Error: " & inner.Message)            Next        End Try    End Sub    Private Async Function Run() As Task        Dim youtubeService = New YouTubeService(New BaseClientService.Initializer() With {            .ApiKey = "API KEY",            .ApplicationName = Me.[GetType]().ToString()        })        Dim searchListRequest = youtubeService.Search.List("snippet")        searchListRequest.Q = TextBox1.Text        searchListRequest.MaxResults = 1        Dim searchListResponse = Await searchListRequest.ExecuteAsync()        Dim videos As List(Of String) = New List(Of String)()        Dim channels As List(Of String) = New List(Of String)()        Dim playlists As List(Of String) = New List(Of String)()        For Each searchResult In searchListResponse.Items            videos.Add(String.Format("{0} ({1})", searchResult.Snippet.Title, searchResult.Id.VideoId))        Next        MsgBox(String.Format("Videos:" & vbLf & "{0}" & vbLf, String.Join(vbLf, videos)))    End FunctionEnd Class

I now need to add that video into a known playlist through the end point playlistItems.insert which got a request body which is playlistItem resource that specifies at least the following values:

The snippet.playlistId identifies the playlist to which you are addingthe video. This is the playlist ID you obtained in step 1. Thesnippet.resourceId.kind contains the value youtube#video. Thesnippet.resourceId.videoId identifies the video that you are adding tothe playlist. The property value is a unique YouTube video ID.

As the user @Jimi specified in here

You have to create a new PlaylistItemSnippet object, specify thePlayList ID, build a new ResourceId object, specify the Kind andVideoID and your ResourceID, add the RousourceId to the snippet([snippet].setResourceId()? no sure), then[playlistItem].setSnippet([your snippet]). Create an insert request(should be dim request =youtubeService.playlistItems().insert("snippet", [the playlist item]))and dim result = request.execute()

but my problem is I am not able to reproduce it into code and make it work together with the code above that retrieve the video id.Can someone give me an hint? Thanks