I've been keeping these updated on my forums. And thought those interested in the game here would like something fun to watch. So here they are :D:

Official Trailer 1: http://www.youtube.com/watch?v=bCaECoQY-FM

Official Trailer 2: http://www.youtube.com/watch?v=F2_ybrbJglQ&feature=related

Official Trailer 3: http://www.youtube.com/watch?v=k4YIaNpApsw

Official TERA Class Debut: http://www.youtube.com/watch?v=VLMMzMYPN6s

Official TERA Sneak Peak: http://www.youtube.com/watch?v=emcF5R897eA&feature=PlayList&p=CD70A4492134114F&playnext_from=PL&playnext=1&index=35

Official TERA Class Trailer: http://www.youtube.com/watch?v=u7zSis0dT5c&feature=player_embedded

Official Character Creation Trailer by Hangame (Korea TERA): http://www.youtube.com/watch?v=D43xgXAdT50

(NEW) Official E3 Trailer: http://pc.ign.com/dor/objects/14356584/tera-the-exiled-realm-of-arborea/videos/e32010_tera_trl_e3trailer_60910.html?show=hi

((You'll notice Trailers 1,2, and 3 might say otherwise on their youtube links. This is because the OP's of those videos had the orders mixed up. Based on the order they're in on the actual game site :).))