Making a New Post: Go to Blogger.com sign in with the account info and find the button to make a new post. I know it may sound silly that I'm even mentioning this, but I got lost the first couple of times. Once you are already signed in, you can just use the header at the top of the blog. There is a button that says new post.
Posting a Video: What ever site you you find your video at will have an embedding link. You just need to copy that and paste it in your text. The thing is you have to look at the code and change the options to make it fit. This text column is too small for a lot of videos. YouTube for example has the default size is too big. Use the size 400x252.
Labels: Underneath the field where you write your post, if you fill in the label system, it will be easier to find a post in the future.
Tags: If you don't know what they are, they are the code (HTML) you enter along with your text in order to manipulate it. It is also what you use when you insert pictures or videos. If you want to make something bold, italicized, underlined, linked, etc.. Check this site out: http://www.pageresource.com/html/textags.htm (Funny that I just posted the link right? I don't feel like looking up the code to do it all nice and stuff). Also the easiest thing to do for most of it is use the formatting bar at the top of the field where you write your post.
I am so tired of staring at this screen and dealing with this site tonight, so I am just going to come back and edit this post tomorrow. Note to self: explain how to edit a post... :-D