Because the link which u created for image its not finding path .it will work on your pc because u putting your image file in same directory where your html file is stored.
I will suggest u upload your image in dropbox and create a link
The Black Hat 🇧🇩 the link works fine but the easiest approach for youtube is actually doing an iframe unless you had created a dropbox link
Oh I guess I fixed the second issue Nilesh fixed the first
The Black Hat 🇧🇩 look at "all the details" on my fix of your code HTML page and I also added a css for the iframe to position it on the HTML side.
You will see the edited img link of Nilesh and the iframe with the corrected link there as well
You will see I sized the img link unlike your original plus sized the iframe.