Six hours a night is usually good for me. However, since I have gotten older, I have become a fan of the power nap! It is life changing I tell you :) Heck I even did a video about it a while back...
Now as for an insomnia aid, many people swear by ASMR videos on YouTube. I co founded what has become the largest ASMR community on Farcebook. Kind of ironic. But there are ASMR videos that are geared towards inducing calm, peacefulness. I even have people follow me on YouTube coz they use my vids to fall asleep by. That dings one's confidence at first but now I have to say, I always nod off when editing my vids lol. Who knew being boring was a virtue :)