What we find essential about safe vision is that the kid can search like normal but it's limited to the approved channels. With about 30 (highly curated) channels the kid can find a lot of safe content.
It also generates an updated dashboard page from new stuff from all the creators, also essential.
The offline thing has never come up for us. They do a yearly sub $29.99, happy to pay. Just an FYI.
I'm quite curious how they go about licensing the content, maybe they just pay the creators a cut of the subscription fees. Or is it really just scraping youtube in some form?
As for the search you mentioned, that might come into it for an older range, for my little ones they still can't read or spell yet, they just want to click on the thumbnail that looks the most engaging at any random time.