I see no-one has commented on the start of the video. Subtitles say "...no room to overtake here..." So what does our intrepid hero try to do? Squeeze between the silver Ford and the cones! Runcorn Bridge is very bad at times - it was even worse in the old days when there were only three lanes.
The cyclist is local and knows there are roadworks so why not look at different routes? I am not talking about Runcorn, Frodsham, Helsby, Capenhurst, Birkenhead, Liverpool, Widnes or the shorter one via Warrington. Use the shared use footpath. Cross the bridge, stop at the first bus stop, cut throught to Irwell Street and then left onto Mersey Road.