[HELP] does embedding youtube video, or instagram image would be legal?

Hello i am sry about this question it must be stuppid but i am a litle bit worried and want to play save as possible so i want to ask you is embedding youtube video, or instagram image to a blog post would conside as an illegal copyright infringement or it should be okay cause we just embedding and not copy the image?

Or it should have certain way to do before i can embed the video or image from social media?