Rust, paper, damaged insulation, and a bare hand contaminating a mystery tube element that appears to be checked for continuity with an incandescent (hot-filament) lightbulb. But can you blame the poor CEI? The Chinese competition has copied its tubes and offers them at half the price, at about $100 on Alibaba (Kailong's catalog, pages 4,5). CEI claims to have spent 600,000EUR on technology since 2014 "for expanding the range of products and for reducing tubes costs." Apparently, that wasn't enough.
Update May 1, 2022: Nanox rereleased this video on YouTube, then it made it private recently (sometime earlier this year, I believe), and now it still lists it in the media section of its website. Clearly, CEI is no longer a tube OEM partner of Nanox, having failed to produce even one working Nanox tube, just like everyone else who has ever tried (not a surprise, since the core component, the Nanox.SOURCE chip, is simply fake).
One of the many problems with this video, other than the fake tubes, is that it reveals Nanox own confusion about its core technology, the Nanox.SOURCE chip. For example, here Nanox claims that its fake Nanox.SOURCE chip is a "novel digital x-ray source." Yet its technical white paper describes the chip as a source of electrons. Electrons are quite different from x-rays, which happen to be photons. And, of course, there is nothing novel or digital about it - this is a failed 1970s technology (Spindt array) and the x-rays made by a tube using it is just as analog as any other x-ray tube - electrons gets smashed indiscriminately into a metal target to make x-rays.
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