I’m marking this thread as rejected because according to the original post, the reason for removing LibreTube was that it was “unmaintained,” that is,
which is no longer the case. And it is no longer “unusable,” as reported by at least one community member here and others in the GitHub issue opened by Bnyro.
I do think that there can be a note added to the top of the YouTube section of the frontends page, which says something to the effect of what @Cyber-Typhoon proposed:
alongside a brief sentence capturing the changes YouTube has made recently and its effect on third-party frontends.
Adding Clipious and/or Grayjay to this page would be helpful in giving readers more options.