Webplayer - Watch players in realtime/Save replays

Actually two questions:

1) Is there any way to watch people playing my game in a webplayer in real time?

I know I can use Google Analytics and Lumos to have data about in-game events, but what about watching people while they play my game in my website?

2) Saving replays of people who played my game in a webplayer in my website would be nice too, I was thinking maybe use this script to save screenshots in my server so I could download the screenshots later and them make videos out of it. Is it a good idea?

I have not used Unity Webplayer yet, so, if these area built-in functions, sorry for the question.

The features you talk about are not out-of-the-box features of the web player. You will need to write them. The script you link to will not work in real-time, the code to actually take the screenshot takes time to execute.

Wathcing people while they play is a bit like writing a multi-player version of your game. The various human players need to have their position communicated to you as a watcher.