PLEASE READ ALL INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO POST YOUR VIDEO.
Here are your instructions, taken from Blogger's Help Menu, as usual:
IF YOU ARE UPLOADING A VIDEO FROM YOUR COMPUTER (i.e. one that you took with your phone or camera), the process is similar to adding a picture to your post.
- Click the clapperboard (the thing movie directors use to say Action!) icon on the post editor toolbar.
- In the popup window, click the tab that says "Upload".
- Then click "Choose a video to upload" to find the video on your computer.
- Click the clapperboard (the thing movie directors use to say Action!) icon on the post editor toolbar.
- In the popup window, click the tab that says "From Youtube".
- Then search for the video you want.
- Your video should pop up. If it does, click to select the video and then press the "select" button at the bottom of the pop-up window. You should be able to see your video on your unposted blog post, and if it does not work there is often times a problem with the YouTube video or it is copyrighted.
- When you publish your post, a lovely video should be posted like this:
If this does not happen, try a different computer or a different browser (Internet Explorer vs. Firefox, for instance). Have fun!