How can I widen my page width on Handy?

[TMcdonald]

Hi - I am hoping someone can help - on all my pages, except the home page, the page width is really narrow.  I have tried several suggestions in the community for editing code, but nothing is working.

I would also love the video section on my homepage to expand to the same width as the other content.  www.pipsolutions.co.uk

Thanks so much in advance.