I'm sure their 'facts' have some truth, but they make a statement, then extrapolate what might happen to the most ridiculous degree.
I'm baffled by the statement where it says (4:41) Britain's debt is 508% of GDP??? Just quickly pulling up a graph of historical borrowing Vs GDP seems to indicate that in 2015 it was about 85%.
Perhaps the video is talking about the total debt in Britain, including personal debt, not just the government borrowing? perhaps someone else can explain. I'm no expert.
I think it's almost at 100% GDP now.
It also uses subtle techniques to make things look worse. For example the graph of borrowing against GDP has the vertical scale offset to make it look worse.
You have to plough through the video to find they want you to click on a link so they can get your details. Scamming bar stewards.