I applied some adjustments to your text so that it sounds more professionally written. They are as follows:
After work [...] It is a commonplace assumption that people do need to take some time off from work on a regular basis so that they can travel or spend time with their families.
Cesar Kuriyama [...] is an advertisement artist, who came up with the idea of... (I would've corrected the rest of this sentence, but it is not clear what did you refer to...)
The purpose of the project [...] is to make it easier for people to remember what they have done in the past.
The last reason [...] After all, most individuals do not bother to capture the moments of their lives on video, especially if there is nothing exciting to be filmed. When Cesar [...] made a point in trying to lead an interesting lifestyle. The video actually [...] This sentence is hardly intelligible... try to break it in two so that it'll be easier to make some sense out of it.
but they [...] can still have all their memories well preserved.
record [...] recorded... who [...] at the time was hospitalized due to...
By taking 'hard' videos [...] Ceasar is able to appreciate...
He [...] strives to make his videos as realistic, as possible.
I hope this came of help. Regards.