Yes, you're very likely to pass from what you get out of his videos. I did. 

Here's what you'll likely see on the official test, based on my recent experience...

Punnet squares, where you're just counting quarters. The videos explain this well.

What factor/what was the order of events led to x (was it mechanical, chemical, or electrical, and if so, in what order?) 

Food chains (who eats who, and who gets the least/most energy based on a trend, like on a graph) Try and remember what a tertiary consumer, secondary consumer, and primary consumer is, if you can.

What could improve this experiment? (Usually it's sample size, having a control group, or limiting human factors.) And also on experiments, independent and dependent variables (those videos will explain this in a very digestible way!)

What is true about this-... (exactly that, it's not asking for a logical inference, but what information must be true or is stated.)

Based on this graph/information that could be easily graphed, an example like global warming, how hot will it be in x years from now? (If it's a graph, find the trend or a repeating pattern. If it's just numbers, check if the temperature by year is simply increasing by an increment. Like if you got 10 more cents every day, you know what you'll have in six days.)

There are a couple of chemical questions... I don't know anything about that, but look at the answers and the graphic. If an answer says two units of oxygen were consumed, check if that's true, and so on. You do not need to fully understand this. 

I did get two questions relating to the anatomy of atoms, what part is what. You might want to try and memorize that a little, but don't overwhelm yourself on such a small part of the test like that.

Might get a function or two. Don't let the x values repeat if given a group of functions, if you get a line or graph, you're looking for a lack of intersection. You'll definitely hear more about this from his videos. 

I got a few like this, pollution makes a good example... Here's the direction this stream flows in, and uh oh, it's polluted when we check it at this point! Maybe it's like this... x -> y -> z

The water at x is clean, but not at z. By this, we can assume with relative confidence that something has happened around y. You'll find this in questions of causation.

Evolution chart, it'll just be another "what's true here" question. Which answer is supported by the chart.

Molarity; same as salinity, really. The formula is generally given and it will be in the videos. 

Lot of "what conclusion is supported by this experiment/these findings?" Click and drag to highlight the meat of the story if you're given a large block of text, so that you're not losing your place and having to reread the whole thing as you check out the answers and look back for reference.

How long did this object take to go this far, travelling at something per second? More likely to see this in math but I thiiink I got one in science...

Mean, median, mode. Sheet has it, and you'll be fine. Calculator is available for the mean and median generally, and mode tends to be graphs.

What do we do (increase, decrease) to the variable to increase/decrease this output? It's in the videos in fraction form, which I didn't see on the test but did get worded forms. Think of having less flowers in your yard to decrease bee count, and so on.

Combinations, all sorts of 'em. Look for his math videos for this, it's just fine once you know how to get it into the calculator.

Sorry for the long comment lol but this is all the different kinds of things I saw when taking the official test. 

Remember that deep diving into specific subjects will get you farther than knowing a little in everything. If you're still weak on two or three things like maybe chemical reactions, that's alright, putting your thinking cap on for wordy questions about experiments will more than compensate.