To add a video for Guillaume Lasceux / Offertoire Symphonie concertante in G major (from Nouveau Journal de pièces dorgue: Messe des Grands Solennels), just enter the video‘s YouTube link:
example) https://www.youtube.com/watch?v=XXXXXXXXXXX
Search YouTube for Guillaume Lasceux / Offertoire Symphonie concertante in G major (from Nouveau Journal de pièces dorgue: Messe des Grands Solennels)