The official opening of the 2019 International Year of the Periodic Table of Chemical Elements (IYPT2019) took place at UNESCO in Paris, France. If you missed it or want to watch it again, full video footage is available in English, French, and Russia — all links available from https://www.iypt2019.org/opening-ceremony
Link here to UNESCO VoD in English
See FULL PROGRAM and more details at https://www.iypt2019.org/opening-ceremony