I have created a video on YouTube and wish to remove your video link and insert my own but it won't let me.
I figured it out. You have to hover your cursor around the bottom of the video frame very very slowly until the cursor turns into a little hand pointing up, and then click your mouse. Then a box will appear with the option to replace the embed url or iframe. When you click on the box, it's all easy from there, but it does take a while to get the cursor just so in order for the box to appear!