Around 5:00 it sounds like he was saying "dead" over & over. The video of him at this time shows him looking at someone being carried out as he watched from a platform.
https://youtu.be/9p82cMjvmO4
British police arrest three men after deadly car blast hits Liverpool Women’s Hospital
https://www.news.com.au/world/europe/british-police-arrest-three-men-after-deadly-car-blast-hits-liverpool-womens-hospital/news-story/f14a9ce1d54ae9bcd77404b3bba8b7a2