got this as a reply
Thank you for your email. Your email was escalated to me as a member of the PokerStars Game Integrity Team.
Before I answer your question, I just wanted to mention a few things that you may or may not be aware of.
PokerStars does not permit players to play on accounts other than their own - even for recording training videos. We also encourage you to upload your videos with a delay or after the session is completed, rather than streaming live to ensure others can't use information such as your hole cards to cheat against you. If something like that were to happen, you would of course be responsible for any losses or damage done.
As for your question, it is not necessary to cover up information in the video such as your User ID, the User IDs of other players, hand or tournament #s, etc. For your own security, I would recommend that you cover up anything that you might consider sensitive, which could include your User ID, but this is your choice.
Whatever you choose, if you want to obscure your User ID, then you probably should also obscure the User ID of the other players, and also the hand history numbers (which appear both in the top of the window, but can also appear in the chat box).
Obviously, we can't guarantee that any individual such solutions will work, so I encourage you to look into this and determine what works best for you. However, here are some options you can consider for obscuring such information:
a) If you use Hold'em Manager or Poker Tracker, you might be able to use the various statistics boxes to cover up the player's names and/or hand history numbers.
b) Find a program which you can set to be 'always on top' to cover the relevant parts of the table.
c) There is software which can be used to pixelate/block out a particular area of film. Here is one web tutorial on how to do this:
d) It looks like Windows Movie Maker - which comes with XP and Vista - can do this itself. If you're using Camtasia or Camstudio (the most common video-making software for training videos) then I think you'll find that they also have similar functions.
I trust that this has been helpful to you, but please feel free to contact us again any time if we can help you further.
PokerStars Game Integrity Team