The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "buy" appeared
2020-11-04 : Q&A at UBS event2018-02-08 : Virtual or virtueless? The evolution of money in the digital age
2017-12-29 : Interview with Börsen-Zeitung
2016-02-02 : Interview with Wall Street Journal