Why is founding ceremony's video only four minutes long?

I found the original video of eleven minutes, at /v? ct=30 1989888。 rn=20。 pn = 0 & ampdb = 0 & amps = 19 & amp； rsp = 2 & ampC4 % EA % BF % AA % B9 % FA % B4 % F3 % B5 % E4 & amp； fbl= 1024

As for the whole ...

Because-founding ceremony's film caught fire.

Founding ceremony documentary was shot by documentary photographers sent by Stalin. This was put forward by Stalin when Liu Shaoqi visited Moscow.

Soviet photographers are very active. Founding ceremony that day, the camera has been on. They made speeches in Mao Zedong, raised the national flag, held a military parade and marched until colorful fireworks flashed in the night sky. Then they happily returned to the Cuimingzhuang Hotel on Donghuamen Street where they stayed. This hotel was the guest house of the Organization Department of the CPC Central Committee in the early days of liberation in Beiping. All their precious negatives are piled up in a room in the hotel.

Film is flammable, but a few days after founding ceremony, a fire broke out in this room where films were stacked!

Dozens of movies were almost all burnt to smoke. Several films that I managed to grab are also broken and can't be used any more. These young people stamped their feet and cried in front of the hotel.

Oh, my God! Founding ceremony can only do it once. ...

It is said that they were severely reprimanded and punished by Stalin after returning to China and sent to Siberia.

Zhou Enlai heard that all the negatives were on fire. After a loud cry of "Ah", he was silent for several minutes in pain.

Also, can I watch a movie /v? E4 & amp； ct=30 1989888。 rn=20。 pn = 0 & ampdb = 0 & amps = 0 & ampfbl= 1024