Bingowings said:

If young Weyland looked like Peter O'Toole it would explain why he (being such a narcissist) was so obsessed with the character Pete played in his most famous film so having the same actor play Weyland as an old man makes perfect sense.

Since he only appears young in only one viral video, I don't think it matters having two different actors play the same character. Or they could've Tron Legacy Flynn'd Peter O'toole.

I have been calling Weyland, Guy-Guy Pearce since seeing the film, as his first appearance in the film wrecked the mood of the lovely first 10 minutes or so.

That really threw me in the movie when he showed up in that stupid make-up.

(not that Jar-Jar was the first thing wrong with TMP).

Jar Jar was in Star Trek: The Motion Picture??? ;)