Uploading video to your blog.

Here is an explanation about uploading video into your blog.

https://support.google.com/blogger/answer/41641?hl=en

Here is how you embed video into your blog from online sources like YouTube or Vimeo.

http://www.educatorstechnology.com/2013/05/this-is-how-to-embed-youtube-videos-in.html

https://www.wikihow.com/Embed-a-YouTube-Video-in-a-Blogger-Blog