Here's a .deb package I made for the latest pipe-viewer (includes also gtk-pipe-viewer, the GUI version, run from Menu > Multimedia)
View Youtube videos without browser, from author "trizen" https://github.com/trizen/pipe-viewer, based on perl.
To install on BookwormPup: Remove the fake .gz extension. Right-click on pipe-viewer_0.5.1_all.deb and select "GDebi Package installer"
Then it will install it and also all the required perl dependencies will be installed.