Now I think it is really worth to create an article with low search volume too, whenever there are link opportunities. (quicksprout.com)
You might even be able to rank easily and get more traffic for keywords with lower search volume. (smallbusinessideasblog.com)
You've done a good job by pulling your high competitive video on 1st position by this method, and for less competitive low search volume based videos, few back links are enough I think. (backlinko.com)