The YouTube interface on the Samsung Blu-ray BD-D510 leaves much to be desired. You can search on a term, and you get a list of results in order of popularity. You also have the option to simply pull up the YouTube application on the player and watch the most popular video of the day, to the second most popular, to the third most popular, and so on and so forth.
One thing I have not figured out how to do is to go back to the search results after playing a video. I ended up typing in search terms all over again, and there is no way to save search terms. You cannot log into your YouTube account and play back subscriptions, liked videos or your history. The Samsung Blu-ray BD-D510 is very, very, basic, and gives you even less functionality than the YouTube mobile site does.
The biggest reason you want to watch YouTube videos is to see them how they were truly meant to be watched. Plenty of YouTube videos are in 720 or 1080 resolution these days; there is no reason to continue to watch them on your computer. But the lack of functionality is one reason why, with this player, you will still continue to watch YouTube videos on your computer.
Netflix requires a two step authentication process. You get a registration code, then have to go to a computer and go to a special website to authenticate your device. What happens, is that when Netflix detects a new device, it makes you to go a computer in order to authenticate that new device. So the code already tells Netflix exactly what type of device it is.
If you are still in the Netflix app as soon as you go to the special Netflix website and enter the code the device is authenticated and the screen loads up a special Netflix site. This is not the same site you see on your computer when you log into Netflix. One thing I noticed, is that the Samsung Blu-ray BD-D510 took me to a site that had hundreds, if not thousands of programs available that I could never find when logging onto the Netflix website. Navigation was a hundred times easier through the Samsung Blu-ray BD-D510 player as well.
One cool feature with Netflix is that if you go into your account settings on the Netflix website on your computer it shows what you have watched on the Samsung Blu-ray BD-D510, and any other devices you have registered. The problem that Netflix has online, is that searching for movies and shows is difficult. The advantage of using Netflix on your TV, is that the experience is far better, the show plays clean, without skipping and jumping around (most likely due to the fact that your Blu-ray player does not need Microsoft Silverlight), and Netflix figures out the resolution for you. Everything is optimized, and there is nothing to figure out.
The YouTube addition is a nice feature; YouTube is free (except for some of the movie rentals), and it plays clean without skipping. The same can be said about the Netflix app on this device. Again, this is a basic, entry level player with 2 apps that give you something to do when you do not have a disc to put in the drive as long as you have a working Internet connection. Definitely worth the $99 I paid for it.