Yes, the recordings and material are accessible here 3rd EUMETSAT/ESA/ECMWF joint training in atmospheric composition | Copernicus
Please note that the most recent joint training in atmospheric composition was held in 2023, the recordings of which are available here: Online Lessons recordings | ATMOS Training 2023
Please note also that the next version of this training will be held in September 2024, all details available here: 6th ECMWF CAMS, ESA, EUMETSAT Training in Atmospheric Composition | Copernicus
Kind regards
ECMWF training team