Welcome to the Q&A Forum

So I came across this idea on YouTube: Indexing your backlinks. I understand its not enough to just have google crawl your pages - you want them indexed. So, if you create backlinks on say a blog or social profile, will it benefit you to have them submitted to other popular blogs, news / pr sites, video channels - of which may be unrelated - for the sole purpose of getting them not just crawled but indexed? There are SEO companies that I have seen that claim they do exactly that (publish your backlinks all over the web - making backlinks for backlinks) but in reality is this a good thing or a bad thing? Could this help rankings or hurt them?