The line itself has your answer - "HMD Global Oy is the exclusive licensee of the Nokia brand for phones and tablets."
The new Nokia phones aren't coming from Nokia Corporation as they did earlier. The phones are now manufactured, sold and supported by HMD Global Oy. Nokia Corporation will only earn royalties for the use of Nokia brand from HMD Global Oy per the number of units sold.
I hope this clears your doubts. The TV advertisements in India are actually run by HMD Global and not directly by Nokia Corporation. That is why they mention the same in the advertisements.