As of right now, when you get an embed code in YouTube you get a few options (see image), which are great, but there are a few more you can add, and actually, some have recently changed.
This is the embed code if all the provided options are unchecked:
<iframe width="560" height="315" src="https://www.youtube.com/embed/I__Dx73EaX0?rel=0&controls=0&showinfo=0" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
Un-checking those options adds the following to the URL after the question mark:
These are parameters with the HTML name for “&” (&) in between each one.
This disables the suggested videos at the end
NOTE: As of 9/25/18 – this will not disable related videos. Instead, rel=0 will show related videos from the same channel as the video that was just played.
This hides the bottom portion of the video
Hides the title
NOTE: As of 9/25/18 – this parameter is deprecated and will be ignored
Other Useful Parameters:
Hide the YouTube logo in the control bar
The video will automatically start playing
The video will replay once finished
How to Use:
If you want to use any of these in your embed code just add the “&” HTML name (&) and paste in one of the parameters above before the closing quote: