Vietnamese Funeral Culture - Ceremony in Huế City by Czech prayer

I had the honor to attend a Vietnamese Funeral. As you can see from the video, I was very bad Prayer, because I didn't know what I should do.
From the beginning, there was a mess. I had to kneel many times and I did not really know how and where...
Anyway, Vietnamese Funeral Culture it's very interesting. Why? Because the ceremony itself takes usually 7 days (more or less), and it has many stages and ceremonies around. People and relatives are mourning together.
People from the family side are bringing money into the envelope in order to support a very expensive Funeral. They are coming and praying for the dead person who they believe that he/she lives after death.
They also build a big grave in the graveyard. So that's why they're giving an offer to people supported by the donation.
If you are looking for answers for those questions:
How does a Vietnamese Funeral look like?
How people in Vietnam celebrate funeral.
What prayers do in Vietnamese funeral.