OpenIntegrations/docs/en/examples/Telegram/SendMediaGroup.txt

    Token  = FunctionParameters["Telegram_Token"];
    ChatID = FunctionParameters["Telegram_ChatID"];
    Text   = FunctionParameters["String"];
    Image  = FunctionParameters["Picture"];
    Video  = FunctionParameters["Video"];

    ImagePath = GetTempFileName("png");
    CopyFile(Image, ImagePath);

    VideoPath = GetTempFileName("mp4");
    CopyFile(Video, VideoPath);

    VideoDD = New BinaryData(VideoPath);

    MediaGroup = New Map;
    MediaGroup.Insert(ImagePath, "photo");
    MediaGroup.Insert(VideoDD  , "video");

    Result = OPI_Telegram.SendMediaGroup(Token, ChatID, Text, MediaGroup);