The extensive LotR appendices, completed in 2004 with the Extended Edition of Return of the King, were also done in SD. At least they and EoD were 16:9. The Alien Quadrilogy making-ofs from right around that same time (2003/2004) were 4:3 and had to be both cropped and upscaled when they were carried over to the blu-ray in 2010.
Dangerous Days was made in 2007 but only released on a regular dvd across all of the various SKUs of Blade Runner released that year (even for the bd and hddvd). It’s 16:9 and looks like it could have been done at a higher resolution and then downscaled. I’m not sure if this was ever definitively answered, but it’s been ten years and the documentary was never released in hd.
Why crop them? Why? Don’t fuck with the aspect ratio, for God’s sake!