Quality of Introduction to stocks Videos

To be honest I'm not sure how i feel about this video. I liked how he wrote everything he talked about because I'm a visual learner and that helps me retain the information. However, he wouldn't explain what he was talking about. For example, when he brought up the bonds he said " I'm not going to get into detail about what a bond is." That's a problem for me because what if i didn't know what a bond is? I would've been confused for the rest of the video!