Do you get any error code/messages onscreen when your VoD freezes? You should do.. and that will give a clue as to the cause.
When you say "all connections are fine", how do you know? What have you done to check? Specifics may help here - and avoid us asking you to check things you might have already done.
The connection between your V6 & homehub, for it is this that provides the internet connectivity, can either be wireless or Ethernet cabled - what is yours?
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