A lot of these points are not specific to DR, but are general advice for any video editor, or learning in general.
The title "7 beginner mistakes" is a typical youtube title designed to grab viewers. There is good advice here, but this video is by no means a list of clear-cut beginner mistakes.He gives the advice of only focusing on the "edit" page when you are first learning DR. DR has 7 "pages", (now 8 as of DR 21).
He gives a whirlwind tour of how to use the edit page. However, if you haven't invested time in a thorough tutorial, expecting to learn what you need in 5 minutes here is silly.
It seems that you can ignore the "media" page and do everything from
the "top left" pane of the edit page.
Edit page - 4 main areas.
On my machine, the top left pane seems to be the entire left. And on my machine typing i and o on the keyboard did not seem to work -- but they do! I was expecting some kind of popup announcement like the video -- but that must be some kind of adornment he added to the video itself. When I look at the display below with the red read head, I see it adds grey markers and shows the active part of the video in grey. So it works!
His point on sound effects is that they create emotion, and that is what you are aiming for. Again, this advice is not unique to DR.
Sounds you see. Sounds you don't see. (background) Sounds you feel.
Gaps and dead air? Cut them out. Good advice, but chopping 2 seconds out of a sentence like he gives as an example is silly.
Don't use transitions between every cut. Use them when you are moving to an entirely new scene or topic.
Shortcuts -- here are two: Ctrl-B and DEL. Apparently DEL on the keyboard now does a ripple delete. When he made the video you needed Shift-DEL to get one.
One way to think about the color page is to ignore the word "color". Just use it as a contrast/brightness adjustment tool. You have 4 controls (shadows, mids, highlights, and brightness (everything). The labels in DR are lift (shadows), gamma (mids), gain (highlights), and offset (brightness). There is even a saturation control. You can import premade color grading LUTs, from sources he describes.
He says flashy transitions and such are "junk food". The boring stuff is what really matters. Ask "what do I want the audience to feel?" and write it down. Feel when the in points and out points should happen.
Color grading is done by a specialist (a colorist). (I keep hearing warnings about color grading being a deep rabbit hole).Tom's Digital Photography Info / tom@mmto.org