How To fade In / Out the Ends of a Video in Lightworks
The same method applies to audio tracks.
P.S. If you're a subscriber who wants more content than just software tutorials, I've reached a bit of a block in that area at the moment. Gaming suggestions would be appreciated (NOT Minecraft). I'm also focusing on this type of video because they get significantly more views than my other stuff, and I may eventually be able to monetise my videos.