Presentation videos from the LibreOffice Conference 2019

Hello everyone,

Just a quick reminder for those who haven't seen it, as the
presentations cover many topics across the LibreOffice project. I've
been editing and uploading presentations from the conference --
currently 44 of them (after the recap video), in this playlist:

https://www.youtube.com/watch?v=5pXO72dJXNA&list=PL0pdzjvYW9RH6TsfCnjhES7iZ6aifidLx

Hope you find them interesting! There are still more to come...