I don't think a cross cut saw is faster and safer. I'd say it was slower, less accurate and no safer.
Have a look at this guy
The safety is really an issue of guarding - much easier to guard a crosscut with a trenching head than a table saw for middle of panel cuts and bear in mind that cross cut saws are required (in a trade shop) to have an automatic/spring return to a home position which must also be guarded (good idea in any case because it then forms a dust collector). Nothing new to me - I worked in a place where we had that sort of set-up in the 1970s. Accuracy is down to how good the machine operator is at jigging it out although measuring devices such as the
Datum Flipstop will give you the same accuracy on a crosscut as you'll get on a table saw off the shelf (but there's no reason why you can't build your own). I honestly don't think that trying to cut 8 or more trenches across a 6ft long end panel for a tall book case is anywhere near as safe on a table saw unless you have something the size of an 8ft slider - even then you're still moving a lot of timber back and forth which isn't that clever in a small shop. Please bear in mind that I'm used to proper trade type crosscuts which unlike deWalt hobby radial arm saws are solid, accurate and retain their settings - with a DW 10in or 12in RAS you have to go in for a bit of strengthening and modification to make them repeatably accurate - something few people do. Chalk and cheese
As a "tradie" I', with Dave. You can hardly expect me to promote or condone the use of relatively dangerous machines such as saws without tooling, can you? I was taught spindle moulding on machines without power feeders, but with square blocks and slotted collars (both of which could and
did shed cutters from time to time - I've been in a shop when that happened and the term "involuntary evacuation" springs to mind) as well as my own personal favourite, the French head, which was well known for its tendency to remove finger tips (you couldn't see the cutter). I've been asked a number of times to teach people how to make-up and use French cutter and I've refused each time because they were banned because they were dangerous and I just can't teach "feel" and "sound" (when they're cutting right, and are sharp enough) over the Internet, or even in a shop in 10 minutes. By the time I started trenching had already been moved from the table saw onto a crosscut following an accident in which a machinist had lost two fingers. They taught me how to use the saw, but it was only as a backup. In my early years at work wood machinists and sawyers always seemed to be missing a finger, or two, or more, so whilst things may be a bit more restrictive these days, you rarely meet the old guys with bits missing any longer which sort of says it all to my mind
Having watched your video I'd say that none of the techniques shown in that video need to be done that way, all of them can be done three or four other ways, in greater safety IMHO. It all depends on training and attitude, I'd say