Asking for your experience of VOIP & Skype with different broadband bandwidths

[computer]

Hi there,

I would like to hear about your experience when using VOIP and also Skype with and without a webcam - with regards to different broadband bandwidths for up- and download.
What problems did/do you encounter for the different speeds?
As a single user of one broadband connection, but also with two people using one connection at the same time for VOIP and/or Skype??

With regards to those broadband bandwidths I would also like to find out (perhaps someone knows this while reading this thread as well) what speeds are needed when uploading a video onto a webpage, say a 5 min , 10 min or 30 min video?
(I do understand that the speed for an upload is relative for everyone, but I mean for an upload that doesn't take longer than a max.! of say 5 minutes.)

Hope anyone can help.

Ta.