I get only a black screen and sound when one of the newly added videos is playing.

For example:
http://www.youtube.com/watch?v=5AMkXF1L0y8&#t=6m10s

Like I said, I only hear the sound or I have frozen screen from the comic video that plays before that.

*EDIT*
To fix this, set your Aspect Ratio to 16:9

Yep, happened to me too.

yep. got this problem too

Same I get only a black screen. Very disappointed in that.

Happen to me also, anybody knows how to fix this?

Yes, happens to me too

Fail release, i am going to wait until it fixed...

Huge fail CDPR... I know now how to fix this and it's ridiculous...

You must set the Aspect Ratio to 16:9 and the videos will play properly. Had to tone it down from 16:10

I am most certainly NOT setting my ratio to 16:9..

That's why I said that it's ridiculous. Took them a pretty long time to get the 16:10 support in and now you're somewhat forced to go back to 16:9 again.

I don't even have a widescreen monitor.

What about us people that play on 5:4 or 4:3 ?

Really hope for a fix soon.I will continue playing and check those cutscenes online if need be.I can't really afford to wait for it,since there are 2 more games that come out this month that I need to play and finish until 15 of may(most of you will know what this date signifies).

Well, you're pretty much f***** then. And on May15, the heavens shall tremble *g*

Noooo! I just finished the Prologue and came across this problem as well!

I bought The Witcher 2 on PC when it came out but didn't have time to play it at the time. When the The Witcher 2 Dark Edition Update was announced I told myself I'd hold out until it was released to play the full experience. When I started it and had finished the prologue the Enhanced Edition was announced. Having abso-fucking-lutely loved the game so far I instantly uninstalled it to wait for the full experience. Now it's finally here and this cutscene problem happens.... :(

I'll have to wait until there is a fix for this... please make this happen soon!

Yes it is the same thing for me too ;(

Same problem too.
Have to wait for another patch...