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You've got it. This is businesses attempting to be listed first in alphabetically-organized directories, like the Yellow Pages. Doesn't work for Local, unfortunately:)

Thanks that what I thought but in the end I made a recommendation against doing anything and keep the website as is. It seemed too risky.

The best practice here is to create a sitemap index - a single sitemap XML file that lists each of the individual sitemap files. That then becomes the sitemap you reference in your robots.txt file and to help speed up the process of crawling, submit that through Google and Bing webmaster tools. (You only need to submit that index file - their systems will then "discover" all the individual files listed in it). See Google's sitemap index how-to.

re="canonical"  - or noindex the video section, dependent on how similar the pages are. If they're different enough, a "noindex,follow" tag will be more appropriate.