Wesker's Report itself, the text form, is 100% canon.
The video is not. It was not handled by the writer, which is why there are some apparent discrepancies.
He wasn't trying to get it for TRICELL.
The retellings in UC were "historic summaries" in order to give players new to the series (introduced with BH4) the gist of the storyline. DC continued that but with emphasis on certain aspects, and to clarify the motivations of certain characters.