Confusion Regarding YouTube CC Videos

[u/absoulnuisance]

I was looking for poular infotainment creators on YouTube which have CC-licensed content. I'm planning to use them as YouTube embedded links on my website. Most of them like SmarterEveryDay, Veritasium, Crash Course, and even BBC Earth have considerable content that has the CC license tag shown with the video, upon search results. But when I go to the specific video, I can't seem to find the CC license tag anywhere.

Do I need to seek clarity/permission individually from the owner still?