Embed YouTube video - Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN' [duplicate]

I am trying to feed my Django page with some resource I am getting from somewhere else.

Inside the feed, I have YouTube videos with URL like: https://www.youtube.com/watch?v=A6XUVjK9W4o

Once I added this into my page, the video does not show up, saying:

Refused to display 'https://www.youtube.com/watch?v=A6XUVjK9W4o' in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'.

Then I said, well, what if I change watch to embed. Then YouTube player shows up, but no video, saying:

How can I get this to work?

I am showing it in HTML like this:

<iframe width="420" height="315"
    src="{{vid.yt_url}}">
</iframe>

I googled almost for an hour, but no sign of success. I tried to append &output=embed - nada...

You must ensure the URL contains embed rather watch as the /embed endpoint allows outside requests, whereas the /watch endpoint does not.

<iframe width="420" height="315" src="https://www.youtube.com/embed/A6XUVjK9W4o" frameborder="0" allowfullscreen></iframe>

The YouTube URL in src must have and use the embed endpoint instead of watch, so for instance let’s say you want to embed this YouTube video: https://www.youtube.com/watch?v=P6N9782MzFQ (browser's URL).

You should use the embed endpoint, so the URL now should be something like https://www.youtube.com/embed/P6N9782MzFQ. Use this value as the URL in the src attribute inside the iframe tag in your HTML code, for example:

<iframe width="853" height="480" src="https://www.youtube.com/embed/P6N9782MzFQ" frameborder="0" allowfullscreen ng-show="showvideo"></iframe>

So just replace https://www.youtube.com/watch?v= with https://www.youtube.com/embed/ and of course check for your video's ID. In this sample, my video ID is P6N9782MzFQ.

You only need to copy <iframe> from the YouTube Embed section (click on SHARE below the video and then EMBED and copy the entire iframe).