This is much more simple than some people realize. We'll walk you through it. Let's look at an example embed code.
<iframe src="https://mightstream.com/embed/magic-code-here" width="800" height="450" frameborder="0" allow="autoplay" allowfullscreen></iframe>
The part we care about is this:
That's it, right there. You can simply change those values to adjust the size of the player that shows up on your site.
Note: The values stated are in PIXELS
You can also change those values to expand to fill full width and height if you'd like. To do that, simply change the values to 100%
If you have any more questions, click the chat bubble in the bottom left and we'll be happy to help.