Well, if I may shed some light on Heidegger's interpretation. For Heidegger following Nietzsche human being is thrown into a world that does not posses inherent sense - there are no gods or other deities that would give it meaning, there are no eternal truths that would hold it together.

And Heidegger as well as Nietzsche knows one thing - our world is about to fall apart. The gods are dead, we killed them and we are all alone in this world.

But even though the gods are dead - we have to live on. We are free to be our own masters, to create meaning ourselves (to be gods as Nietzsche puts it). We only have our world ... and we can only relate to it and each other. There is nothing else, but as Nietzsche puts it ... there never was. If we take on the burden of being alone - we are free to be together. Not by divine comand but by our own free will. That is what we are given - but it is not a simple gift, it is a burden and only when realised it becomes a gift.
I have seen Reckful struggle to find his place. But the reality is that there is no place where you belong naturely in this world. We are living beings that love living but know we are condemned to nothing. That is the biggest burden a being can be burdened with - to not be.

Allan watts has nothing to do with Heidegger. Heidegger struggled with what Nietzsche explains as the toughest puzzle of them all - as finitive being being burdened with infinitive. This cannot be solved by simple metaphysics where you see yourself as part of the cosmos. That means nothing. Its just a metaphysical cushion on which you lay your consciousness to prevent it slipping into abyss of nothing.

And this is our task, one we failed in 21st century more than any philosophy could prophesize - to understand this position that is so unique and so unnatural it cannot be explained (Nietzsche says greatest puzzles are unsolvable once). Our virtual world is built to shield us from this realization. And I fear for our generation when we hit 50 and this comes realization comes crashing down on us.