A few days ago Google employee John Mueller confirmed on Twitter, that the search engines do not use links from YouTube in the search.
So, one of the industry experts said,
"I have a site with lots of relevant content varied. Can I comment on a few videos to YouTube (of course, given the relevance), [using the links on this page], or they can be interpreted as spam? My goal - just pay attention to your site when it [may be] interesting and not get PR ».
Mueller replied:
"In any case, we do not use links from YouTube to find, but people may be annoyed if you comment on a video with a link to your site."
Recall that in May, Google began testing a web page showing up in YouTube search results.