Yes, you can go about reading a book in different ways depending on what and why you are reading and what works for you.
I think it is highly unfortunate that universities these days, at least in science, then to force students to buy a new edition every year, or at least every couple of years.
There are just about no scientific discoveries in math that requires undergraduate and few matters that require an entirely new edition of graduate books.
I have also heard but never experienced that some books apparently have an online component that is valid only for one person or one semester or possibly one student per semester. If true this is even worse.
I strongly prefer books to videos. A lecture is good to prepare you or to wet your appetite. And to clarify known difficult spots in the book.