I have no idea if it has YouTube, what does their website say?
As far as the Samsung HTiB...I'd offer up the following as an alternative if you don't mind refurbished.
A refurbished AVR-154 goes for less than $150 at auction at the Harman Audio store on eBay and comes with a full MFG warranty: http://cgi.ebay.com/Harman-Kardon-HK...d=p3286.c0.m14
The same goes for a JBL SCS5005.5 speaker system, under $150: http://cgi.ebay.com/JBL-SCS500-5-6-P...d=p3286.c0.m14
At $300 for the receiver and speakers you could easily get the Panasonic BD60 that definitely has YouTube and is a well reviewed player. The Harman Audio store doesn't have much for 5.1 speaker systems right now but they'll list a new batch pretty soon - they always do. The above speaker package is just an example but they have similar deals all the time, you just need a little patience. I had a very good experience dealing with them; I had a minor concern with a receiver I bought and they quickly offered an exchange at their expense.
I think the biggest drawback to buying an HTiB with a BD player built-in like that Samsung thing is that if something goes wrong you have to throw out the whole thing. The chances are higher because of the moving parts - things do go wrong with DVD players.
The other thing to think about is connections - the BD player/receiver usually has very limited inputs. If you have other components you want to connect to your sound system (DVR, TIVO, Cable box, VCR, etc) it might not be possible to connect more than one with most HTiBs.
Lastly, related to BD players in general, is the level of support for firmware updates which I understand is important. Many times I read that a certain or newer disk won't play unless you have the latest firmware. Though I've never had that type of problem, I've read that Sony and Panasonic are the most diligent with updates and Samsung and LG tend to seriously lag.
A good BD player costs around $200 so buying something separate could be a good idea if any of the above concerns you.