find additional slides

[kaabl]

Issue: Currently only entries in .yml that contain a ‘type’ = Slide tag are used to extract slides. But entries without this tag can also contain slides (Example).

• identify .yml entries without 'type'
• check if those contain link that lead to slides
• decide on how to deal with .ppt/.pptx, .odp, .zip
• check for direct vertical .pdf links -> only 2 but already type = 'slides' (Example)
• decide whether to also include urls without zenodo (e.g. x145 github, 6x docs.google, 11x F1000, 7x git.mpi, 14x doi without zenodo, 18x ebi.ac.uk, 28x youtube)
• discuss duplications
• revisit licensing question as there are 76 entries in the .yml that don't specify a license but could contain slides: Example
• decide on whether to curate .yml file