Learn This Simple Secret Trick to Download and Watch Your Favourite YouTube Videos. You’re just found an interesting video on YouTube and you want to download and save it to your computer so that later, you can share it with your friends or just keep it as a collection. However, you soon realise, by default, YouTube doesn't allow you to save or download any of the cool videos posted online. Even worse, YouTube may remove any video at any time. The solution is in this presentation.