The webapp provides for each item the link on ECB's website.
Speeches for : Isabel Schnabel where "volume" appeared
2023-03-27 : Back to normal? Balance sheet size and interest rate control2021-05-28 : Interview with Reuters
2021-04-14 : Die Geldpolitik der EZB in der Corona-Krise
2020-12-14 : Welcome address
2020-07-21 : Interview with Expansión