When clicking on the videos in the "Also on Viewly" section, the redirect goes to a "404 page not found." The problem seems to be %40 showing up in the URL, when it is removed the page loads properly:

https://alpha.view.ly/view/%40useruploads/forging-self-sovereign-identities-in-the-age-of-the-blockchain-weboftrust-blockstream-9d325d0c08

https://alpha.view.ly/view/useruploads/forging-self-sovereign-identities-in-the-age-of-the-blockchain-weboftrust-blockstream-9d325d0c08