I hate to say it, but you've just described what a good SEO does. The good SEOs (and SEO firms) will analyze and take care of your internal links, your internal link structure, and make sure the site isn't linking out to outdated/old links.
If you want to do this yourself, there's several crawlers out there that you can find the data yourself.
Many publications have been reluctant to link out to sites over the years because of this very thing--link rot.
Good SEO still doesn't fix the root of the problem--lost content. If you write an article about a video, and that video gets pulled, there goes your article.
If you want to do this yourself, there's several crawlers out there that you can find the data yourself.
Many publications have been reluctant to link out to sites over the years because of this very thing--link rot.