Don't sweat it. I postponed my FAR exam by a month (BIG mistake on my part) because I feared that I would be going too slow to finish it. I finished it with 15 minutes left on the clock.
I didn't pass and am re-taking next quarter, but I finished it.
Just to allay a few of your fears – including going too slow – the MCQ on FAR are not usually very calculation-intensive. They're mostly qualitative, and surprisingly, they even ask dictionary definition-type questions (I got several of those, totally caught me off guard.) You don't hit the big calculations until you get to the SIMs.
Then you need your white (or yellow or pink or green or blue) boards and black pen. Get thru the MCQ in 90 minutes tops. There are only 72 of them. If you can get them done in under 90 minutes, you're doing good. Leave 2 1/2 hours for the eight SIMs and the research question (on my last sitting of AUD, I got a research question that I *thought* I had nailed but then realized I hadn't; I had to go back and do it again because I looked up the info in the wrong set of standards.) Thankfully it was on my last testlet, or I would have been really skrewed because they don't allow you to go back and forth anymore.
Just be 200% prepared. People get 50% on practice exams and still pass the real one. The more prepared you are, the easier the 4 hour marathon will be. FAR is the hardest one to learn everything in, but definitely not impossible. I was surprised at how easy a lot of it was….but, I'd forgotten a good amount of what I'd studied. You mentioned videos and note-taking. I've found, after having sat for two sections now, that videos were largely a waste of time. It depends on your learning style. I found note-taking to be much better. I took over 100 pages of notes for FAR, but I burned out and didn't even have time to review them. BUT…I took maybe 60 pages of notes for AUD and did go back and reviewed them and it helped.
BTW, cramming for these exams is not advisable. It does need to be at the front of your brain, but those who try to stuff things in during the last week, up thru the morning of the test usually don't benefit much/at all from it. Get all your studying done 3-4 days before the test and just focus on any difficult stuff in those final few days. Review notes. Review the MCQ and SIMs that you've worked for practice. Don't go back and re-read the text or do videos. Just my 3 cents' worth of advice.
Best wishes!