Clicked on the link and received a message that the video has been blocked by SME over copyright issues (guess you had music layered over the clip?). Assuming from the thumbnail that this is the section where you outrun the Deletion Wall, once you successfully escape from the tunnel you should take your time to make sure you kill all the Vex that have spawned and double check that the wall has come to rest at its final resting place before depositing the green buff in the receptacle, as trying to complete this section too quickly can apparently bug out the encounter and result in an instant wipe. (΄◉◞౪◟◉｀)