Did you drain the intake to get an approx measurement trapped in there? Otherwise, all I remember in the video is some accumulation around the manifold ports, which might look like a lot, but may be fractions of an ounce in reality. And in the 2nd vid, 13km had elapsed since you first vid? Does your catch can have a sintered bronze filter?
And note that I *want* a catch can to be effective, but there are so many ineffective aftermarket solutions, all claiming to solve things "the dullard OEM's couldn't be bothered to solve". From the near-cult addiction to certain oil brands, viscocities, additives, change intervals, oil filter wars, intake system battles, spark plugs... Now days, I just start off cynical of new products, until someone(s) OTHER THAN the manufacturer or sponsored party perform controlled tests. Project Farm is quite good at this.
Andm BTW, thank for the inspiration to pull the intake to clean valves! At about 30k miles, I did't have significant manifold oil accumulation, nor any dramtic carbon build up on the valves. I cleaned them anyway, but there wasn't much (if any) change in drivability, smoothness or MPG.