In my experience it's faster for learning because you will recall more after a study period if you do the flash cards vs. rereading things a few times. Not an either or thing as well. I would put a lot of my lecture notes in the extra section of the flash cards, then if I want to get more context I can scroll through my cards sorted by created_at in the browser.

Ideal workflow is watching lecture online at 2x speed with Anki add card window open along side lecture window, pausing when it's time to make a card, write the text for the card and use Lightshot screenshot to quickly grab any images or text (or for image occlusion if you're using that, rebind screenshot capture to F4 so you don't need to use your mouse hand to press PrntScrn). Once you're done adding cards, go through them once that day. Or, if you're using a premade deck, watch the lecture, unsuspend cards relevant to the lecture, then go through them right away.

Not sure if you're using it for school or not, but I think the process will work the same either way. Works even better if you're using it along with a memory palace kind of thing like SketchyMicro or Pixorize. Those images will be burned in your brain and your recall will be insane.