The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "december" appeared
2019-11-11 : Opening remarks2018-07-01 : Are the economy and monetary policy at a turning point – and where are the European and US economies headed?
2017-02-10 : Behaving responsibly in a low interest rate environment: A central banker's perspective
2016-02-02 : Interview with Wall Street Journal
2015-11-15 : Interview with Les Echos