The details were taken out from Wikipedia and pasted here for clarification - the meaning are the same - in the video itself one can note that separate goods carriage/wagon are sent in different lines - hope this helps.
I have reproduced the contents from wiki and some information is also there for the largest humpyard
Knowledge updation - thanks.
Hump yardsThese...
more... are the largest and most effective classification yards with the largest shunting capacity – often several thousand cars a day. The heart of these yards is the hump: a lead track on a hill (hump) over which the cars are pushed by the engine. Single cars, or some coupled cars in a block, are uncoupled just before or at the crest of the hump and roll by gravity into their destination tracks in the classification bowl (the tracks where the cars are sorted).[1]
The speed of the cars rolling down from the hump into the classification bowl must be regulated because of the different natural speed of the wagons (full or empty, heavy or light freight, number of axles), the different filling of the tracks (whether there are presently few or many cars on it) and different weather conditions (temperature, wind speed and direction). As concerns speed regulation there are two types of hump yards: without or with mechanisation by retarders. In the old non-retarder yards braking was usually done in Europe by railroaders who lay skates onto the tracks, or in the USA by riders on the cars. In the modern retarder yards this work is done by mechanized "rail brakes" called retarders. They are operated either pneumatically (e.g. in the USA, France, Belgium, Russia or China) or hydraulically (e.g. in Germany, Italy or the Netherlands).
Classification bowls consist of, on average, 20 to 40 tracks divided into several fans or balloons of tracks, in Europe usually with eight classification tracks following a retarder in each one, often 32 tracks altogether. In the USA, also, many classification bowls have more than 40 tracks (up to 72) of which they are often divided into six to ten tracks in each balloon loop, compared with eight in Europe.
The world's largest classification yard is a hump yard: Bailey Yard in North Platte, Nebraska, USA. Other large US hump yards include Argentine Yard in Kansas City, Kansas, the 2nd largest in the world, Robert Young Yard in Elkhart, Indiana, Clearing Yard in Chicago, Illinois, Englewood Yard in Houston, Texas, and Waycross Rice Yard in Waycross, Georgia. Notably, in Europe, Russia and China, all important classification yards are hump yards. Europe's largest hump yard is that of Maschen near Hamburg, Germany; it is only slightly smaller than Bailey Yard. The second largest is in the port of Antwerp, Belgium. Most hump yards are single yards with one classification bowl but some, mostly very large, hump yards have two of them, one for each direction, thus are double yards, such as the Maschen, Antwerp, Clearing, and Bailey yards. According to the PRRT&HS PRR Chronology, the first hump yard in the US was opened May 11, 1903 as part of the Altoona Yards at Bells Mills (East Altoona).
However, due to the transfer of freight transport from rail to road and the containerization of rail freight transport for economical reasons, hump yards are generally in decline.[citation needed] In Great Britain, Denmark, Norway, Japan and Australia, for example, all hump yards have already been closed