I saw this and just realised what the problem was, the video was actually shot in widescreen (hooray) but has always been played without the correct anamorphic settings on to a 4:3 screen (I think - it looked like it was squashed from memory but it's been 2 years since I saw it and I tend to not focus on the technical things when Im enjoying a ride
).
I've corrected it below - on the left is how the video appears in the ride without the correct settings (it would be easier today because most video files are rendered in widescreen aspect anyway without anamorphic bla-bla).
Will Alton Towers finally realise and correct this? The video looks dated without it, when it's surprisingly more cinematic in widescreen. Also they could do with a much larger screen these days.