New poster but long time 'lurker' if that doesn't sound too strange

Firstly, as someone who has run a forum for many years, a big thanks to AndyJ and all those who contribute to the site - appreciate all the help & advice posted that I have read and used - has been of a great help previously!
So, in an attempt to avoid any potential issues with a new site I wondered what the answers to the following would be:
I have noted an issue with a well known website that is rather frustrating for the users.
I wanted to publish on a website a workaround to assist users resolve this issue.
The website would have adverts so would be classed as commercial.
Would a screenshot(s) of the website be classed as copyright infringement?
Would a video, displaying my screen, showing me navigating the website and the way to resolve the issue be classed as copyright infringement?
There are conflicting answers out there, many relating to the US - we are UK based.
Thanks in advance!