Edit: Oh and LinusTechTips, I can't believe how long it took me to get on board with that channel.
2veritasium
ARMdevices.net
BrainStuff - HowStuffWorks
colinfurze
Computerphile
EEVblog
ElectroBOOM
engineerguy
In a Nutshell – Kurzgesagt
mikeselectricstuff
Periodic Videos
SmarterEveryDay
Sixty Symbols
The 8-Bit Guy
The Checkout
tesla500
Tom Scott
Veritasium
Vsauce
WonderWhy
Second: I don't see how this is the case ("...prevent users from realizing how light their catalog really is.". Looking at what they show me when I search or browse already makes the selection look anemic. Using a few of these codes helped me find stuff I didn't know was there.
They structure their site so that you don't realize that they don't want to make you super happy—they just want to keep you barely happy.
Now I'm resigned to them providing "more than I'd like to watch than I have time for", and expecting to go elsewhere for "I want to watch this, now who has it" content.
Netflix's movie selection is really abysmal. After finally cutting the cord, going full-legal and all that. And then: "Hmm, I'd really like to watch movie X", and then you search for it on Netflix, thinking oh it's some relatively-semi-popular movie from half a decade ago, it should be on Netflix. But nope, they recommend you sign up for a DVD plan instead where you can get that movie. Don't even expect one of the "new blockbuster" movies on Netflix, not going to happen. For that have to fork out a pay-per-view amount of $$ on Amazon Prime/Google Play/Itunes.
Add to that that they haven't created an "add to my queue when new episodes come out" option and how shows have been on/off availability rapidly and Netflix isn't nearly as useful as it used to be.