You seem to have a very skewed idea as to what this is.
Let's put one thing into perspective here: Sesame Workshop is not a company, it's a non-profit organization. They're spending millions of dollars producing content all over the world for us to watch FOR FREE. So, it's totally within their power to remove material from YouTube because A. it's not ours to share and publish and B. the potential of them not having money to fund their entire operation. Excuse them for trying to save a buck. I don't agree with this new policy that they're starting to have, but they technically have every right to have it. I was hesitant to upload that Sea Captain the musical bit because I knew it would be on the DVD soon, so there would've been no point in uploading it, but I did it because several people asked for it.
SW is hardly doing any of this of selfish, "money-greedy" reasons. And in the grand scheme of things, who cares? There's literally hours of other Sesame material on their site and elsewhere on YT. What's a few videos you can see regularly on TV gonna matter if they're gone?