Don't use his videos for facts, hes just as bad as the other pro-Dyson kids on here. What you have to understand is the ClearTrak was THE first bagless vacuum to the US market. They have a single cyclone air chamber, large filter boxes that feel like something out of a 1960s mechanical contraption, really loud motors, and are extremely clunky. It will not be perfect by a long shot by any means compared to some German job you can buy today that costs 5 figures. They also never caught on to domestic buyers and became rare as a result, not withstanding the lawsuits from Sir James Dyson.
But where they flopped in the home market, they still make these today for the commercial market under the Workhorse name, where they do really well for those that use them. I am not sure if the Workhorse filter mediums are upgraded over the original 1990 OEM filters from Amway, but you can still get every single part pretty much for the ClearTrak still to this day, which is pretty remarkable. Yes they are clunky and obtuse and might not suit everyone's house for getting through furniture and into the nitty gritty, but they do a really good job considering the technology of the time period. This vacuum stood uncontested in the bagless market until Fantom came out with the Thunder. It's pretty fascinating what was going on with vacuum cleaner technology in the late 80s/early 90s.
I do not think the filtration is bad. It may miss some particulates or blow them around from the motor exhaust port, which might not be best if you are deathly allergic, but for the casual everyman, this vacuum is no worse off than any other bagless vacuum you can buy today.