Links are okay....

To start, this site doesnt tolerate plagiarism so anything you post that is from elsewhere should have a reference. There are bots that go around and downvote people who dont do that. So if you use google images for your pics just denote it there.

To fully answer about links, yes that is fine. However, I can tell that it will be difficult to get ahead when you are consistently just posting links to videos or sites. I know I just pass the people by when I click on a good title and see it is nothing more than a youtube video.

If you are using an article, write up your thoughts and then link the article for those who want to fully read it. Then you have original content plus are linking the source. All are happy then.