It depends on what you are defining as "risky." Passing in turns is some of the easiest ways to pass.
Risky as in if you don't know to a reasonable level of confidence that the guy you're trying to come inside on won't blindly put his fender in your door.
Passing Exiting a turn is the easiest pass, because you know the person your passing will drift to the outside unless someone crowds them in, AND you know by then that you will be faster than them. Followed by the faster exit on to the straight pass. Which happens more in the clip you posted from the start point to 27 min than any other passes. (21:14 and 22:11 for some good examples)
I'd be curious to watch some of your laps and see how you do handle traffic. I'm wondering if this is regional or per track etiquette that has developed.
Prepare to be UNDERWHELMED!
Here is part of one of my stints (Rob vs. Rob - A friend of mine is in the brick mustang and I am in our mustang). The yellow car gives us room on the inside to get our passes done. Which according to you is risky/sprint car passing. I then give room to right to let the BMW pass and get to the apex. I lose a little time but I didn't wipe him out since it would have been his responsibility to make a clean pass while I move to the apex. Then in the next corner, I pass the Subaru mid/late turn after he allows room. https://youtu.be/2ROAhjuOqRE?t=18m15s
You can see exactly what I'm talking about at 26:51 when two cars leave the apex open for me to dive into. And then a few turns later a blue and while car does the same thing - leaves room to the apex to (apparently) let me go. Then one turn later, I do the same and let the honda go.
I literally just see a lot of cars of diffrent paces reacting to each other sharing a track. Half of the "Made way for you" just look like good old fashioned holes followed by drivers being mindful of not driving into cars taking advantage of those holes. There really weren't any "competitive" passes. The only cars you were matched with were never close enough for a pass, or were just past your rear view mirror.
Which returns to my point which is, you don't NEED to make every pass EVERY time, because most podiums are separated by multiple LAPS. That's what makes it diffrent from a 20 min sprint race or a 2 hour "event" race where most of the field finishes on the same lap. As an overtaking driver you have the luxury to exercise the patience of waiting for a good clean pass, because the person you're "racing" on the race monitor is LAPS ahead or behind you usually. So other drivers shouldn't have to worry about helping you by unless they are definitely slower than the cars around them.
Mistake By The Lake Racing (MBTL)
88 Thunderbird "THUNDERBIRDS ARE GO!"
A&D: 2014 Sebrings at Sebring (NSF), 2014 NJMP2 Jurassic Park (SpeedyCop), 2012 Summit Point J30 (PiNuts)
2018 Route Sucky-Suck Rally Miata.