No. Because Isaidub is a piracy site, the "full" movie is often a low-resolution print, sometimes recorded in a theater with a handheld camera ("CAM rip"). The audio is often out of sync, and the video is grainy. You are not getting the true HD experience.
I'm assuming you're looking for information about the movie "Night at the Museum: Battle of the Smithsonian" (2009), which is the second installment in the Night at the Museum series. isaidub night at the museum 2 full
This loss means: