Trouble inserting videos

I don’t see any way to insert a video without getting a plugin. Am I wrong? I’ve downloaded two plugins and am having trouble with them both. First I tried Ultimate Tinymce. I finally figured out to enable the “Insert Youtube Video Button” as well as the “Insert You Tubeiframe Video Button”. However, neither of them seem to work.

The first button displays a yellow square in my post that does nothing. The other (iframe one) gives me a place to insert the url and a couple of setting choices, but no “insert” button or “done” button or anything to actually get the video into the post. There’s a lot of blank space in the little pop up window where there probably should be a button of some sort.

Then I installed WP Video Player. Apparently this one works by inserting the url plus a “v” after http into the html. With this method I did get a video when I went to preview, but it was super short, like half the normal size, but the regular width and only showed the top half of the video picture. If I adjust all the size settings it changes the video itself within the frame, and I can get it to a tiny square where I can see the whole picture, but the frame itself stays short and wide no matter what I do.

I tried the formatting option for “video” but clicking it doesn’t seem to change anything, and the bulk of my post is text and photos, so I don’t know if I should be using the video format or not. I usually used Standard.

I don’t know if this is a bug with the theme, since I’ve had trouble before inserting ads due to the theme, but I”m really hoping not. I’d appreciate any help. Thanks!