code: func (config VideoConfig) values() (url.Values, error) {
  	v, err := config.BaseChat.values()
  	if err != nil {
  		return v, err
  	}
  
  	v.Add(config.name(), config.FileID)
  	if config.Duration != 0 {
  		v.Add("duration", strconv.Itoa(config.Duration))
  	}
  	if config.Caption != "" {
  		v.Add("caption", config.Caption)
  		if config.ParseMode != "" {
  			v.Add("parse_mode", config.ParseMode)
  		}
  	}
  
  	return v, nil
  }
docs: // values returns a url.Values representation of VideoConfig.