Prof Gary Collins gave the talk "Penalisation and shrinkage methods do not guarantee a reliable prediction model" for the MEMTAB 2020 conference, and can be viewed below.
The corresponding paper has now been published in the J Clinical Epidemiology (PDF).
Penalisation, Shrinkage & cross-validation
Prof Robert Tibshirani gave the talk "Cross-validation: what does it estimate and how well does it do it?", which has important implications for the use of CV in prediction model research, and links closely to the work presented by Gary Collins