You should be able to link to them, but Dendron has no special support for them so you won't be able to view them in the preview. It may be possible if you inject some HTML into your notes to get a preview working, but we don't have any examples of that. Edit: Ah, looking at their docs, the "embedding the player" part might be of use: https://asciinema.org/docs/embedding It wouldn't work in the preview, but it should work in published sites