What type of projects do you intend to get into?
Since you said most of that video is over your head, it would be a great idea for you to buy some learning materials. The main recommendations for these seem to be:
1 - The Art of Electronics
2 - Practical Electronics for Inventors - Paul Schertz and Simon Monk
3 - Engineering Mathematics by K.A. Stroud
-I downloaded them and read the first few pages to see which would suit me best, and by far "Practical Electronics for Inventors" is the ideal choice for me. Not only can you get it for approx $25usd, but it starts out assuming the reader knows nothing about the subject.
-I had initially tried to teach myself by just digging into a scope repair... but after a short bit and massive frustration, I realized that it was crucial to build a knowledge base of the theory, basic circuits, interactions, etc. Be wise and learn from my mistakes!
Unless you need the advanced functions of a digital scope for your initial projects, it is definitely best to pick up an old analog scope for around $50 and learn how to use it properly. That way you have a good understanding of the basic functions of a scope when you make the jump to a digital scope (and don't get into the habit of pressing the "auto"set button! which makes the scope attempt to set everything up for you..)
-Also, Dave actually strongly recommends an analog scope for those new to scopes.-
Note: downloading copyrighted materials is illegal. The only times that I do so are when I want to 'sample' a product to see if it's the right purchase for me. Not only does buying the product support the creators, but it gives you a much better quality item that will last. Book scans are typically low quality with very poor image quality, so the actual paper book is always a far better choice.