How can I include videos and pictures in posts?

Questions
1

I’ve seen you put images and Youtube videos in your posts. How do you do that?

2

I think if you just write the url it works

3

Try with html

4

I tried writing the URL of a video and it worked perfectly. Thank you.

5

If you want the video to come out bigger in your post, you can paste YouTube’s embed code (tick the “use old embed code” option) into your post instead.

6

Thank you @Simeon, I’ll try it next time.