Why iframe tag can't able to show youtube video via link?

Question

<iframe src="https://youtu.be/0DPLee1TmPo"></iframe>

I am sure syntex become correct but it can't work. Full code in my (activity) ' YouTube '.
https://code.sololearn.com/W91CYeZ7fZv8/?ref=app

Answer 1

Youtube prevent us to use its video in iframes, thats why you get "same origin" this mean only youtube webpages can access it.

You can post it only if you include "embed" in link
So replace your src to
src="https://youtube.com/embed/0DPLee1TmPo"

I replaced youtu.be with youtube.com/embed