The most important advantage of the Classic Layout, especially for old browsers, is that it gets displayed without JS too, for at least seeing what the video is about, description, date, number of downloads, likes etc. And then it's possible to get direct video links with sophisticated userscripts.
But with old system, old browsers, short on RAM etc, and blocked JS (which would only freeze anyway) it's a disaster now: neither Mobile nor "Modern" Layout shows anything ecxept gray fields or black box, zero text, and the direct embed-link only opens an error page. Which doesn't contain even descriptions in the source.
At the moment my only one -lousy- workaround for any non-Classic view is to load the full (300kb) page source with Ctrl+U in Notepad++, then run Plugins > JS Tool > JS Format, and scroll down to almost bottom to finally see some readable text at least. How to get the video download links the future will tell. Perhaps using 3rd-party websites again, or someone can update the userscripts?