I watched the video carefully. Hu Jingtao patted Xi Jinping and Li Keqiang on the shoulder before leaving.
But the attitudes of the two actions are different. The former contains an encouraging attitude, and the latter contains a comforting attitude.
That may mean that Xi Jinping has obtained his third term of office, while Li Keqiang has not continued to serve as a member of the Standing Committee of the Political Bureau.
Li Zhanshu and Wang Huning around Hu Jingtao seem worried when his body is in trouble. Later, Li Zhanshu stood up to help him, but Wang Huning seemed to say something. If I guess correctly, Li Zhanshu is no longer a member of the Standing Committee of the Political Bureau, while Wang Huning remains a member of the Standing Committee of the Political Bureau.
The list of members of this Standing Committee should be. Xi Jinping(习近平), Wang Yang(汪洋), Wang Huning(王沪宁), Zhao Leji(赵乐际), Li Qiang(李强), Hu Chunhua(胡春华), Ding Xuexiang(丁薛祥).