Ok, I finally got it. I had to adjust the memo field syntax as this was not able to be aggregated. I have to say it was one of the most difficult SQL I ever had to deal with. Thanks to you, Sergey and Fabio for all the help.

Here is the final SQL:

SELECT Program.Numero,Program.Title,Program.Notes_E,Program.Notes_F,Program.NoMaster,Master.FirstName,Master.LastName,;
 MasterType.Title_E AS MasterType_E,MasterType.Title_F AS MasterType_F,Program4.VideoNumero,Video.Url;
 FROM Program;
 INNER JOIN;
  (SELECT Program2.Numero,MIN(Video2.Numero) AS VideoNumero FROM Program AS Program2 ;
  INNER JOIN Video AS Video2 ON Program2.Numero=Video2.NoProgram;
  WHERE Program2.Active AND Program2.Numero IN;
   (SELECT Program3.Numero FROM Program Program3;
   INNER JOIN Video AS Video3 ON Program3.Numero=Video3.NoProgram;
   INNER JOIN InvoiceI ON Video3.Numero=InvoiceI.NoVideo;
   INNER JOIN Invoice ON InvoiceI.NoInvoice=Invoice.Numero AND Invoice.AddUser=?);
  GROUP BY Program2.Numero) Program4 ON Program4.Numero=Program.Numero;
 INNER JOIN Master ON Program.NoMaster=Master.Numero;
 INNER JOIN MasterType ON Master.NoMasterT=MasterType.Numero;
 INNER JOIN Video ON Program4.VideoNumero=Video.Numero;
 ORDER BY 2