1.5 m

It can be folded so that it can be held on the screen, it is shown in the introduction guide:https://www.microsoft.com/accessories/it-it/d/lifecam-hd-3000

I am not a Digitec employee. However, Digitec offers also products which they do not have on stock. Currently, Webcams are sold out everywhere. Digitec had some numbers of the the cam you ordered (I got one) for a couple weeks ago. But it was obviusly sold out very quickly. But don't worry you do not have to pay if they do not ship anything. Just order as quickly as possible one anywher weher you see it and make sure they have it on stock.

According to the Microsoft product website, this product has limited compatibility with macOS: https://www.microsoft.com/accessories/de-ch/products/webcams/lifecam-hd-3000/t3h-00012#specsColumns-sysreqs Hope I could answer your question. If so, please accept my answer as an answer to your question.

No, unfortunately this is not possible.