Having played ball golf....here's my issues with the comparison. (disclaimer: I haven't watched the video)
In ball golf, the ball is intended/designed to go straight. You add hook/draw or slice/fade by aligning the club differently.
In disc golf, the discs are intended/designed to curve (based on stability)
In ball golf, you are standing still, your head remains on the line, and you can see the direction the ball will go.
In disc golf, you are moving, your head turns away from the target, and you can't see the direction the disc will go.
When I played ball golf, I had very little trouble hitting my line.
In disc golf, I have lots of trouble hitting my line.
So, I don't see ball golf alignment suggestions working for disc golf. But, what doesn't work for me, might work for someone else.
There is one major que in ball golf to disc golf when it comes to aiming.
Posture.
and yes.
Curse the lines on disc golf vs ball golf. hahaha.
But, lets back away for a moment.
In disc golf, if you really really really want to hit lines, you should be doing a standstill throw. You'll gain the most accuracy and stability.
What does that mean?
It means that just like ball golf, our feet are one of the main things that help us "aim" that is assuming our swing is clean. Because you can snap hook or slice hard based on dropping the shoulder or rounding in ball golf. Which you can also do in disc golf. These particular things do correlate, just... not quite in the same ways one would think. Crap. off topic. I digress.
In ball golf we align our swing plane and club face to our feet to aim the ball down the fairway.
In disc golf our feet position based on our swing when we throw the disc determines our aim as well. People are not really willing to put much stock in it for some reason when we talk about hitting lines and just good overall swing mechanics.
If your swing is consistent and your footwork consistent, your feet determine where the disc goes 100%
Same for putting. Though, putting in ball golf and putting in disc golf do not correlate whatsoever. But proper putting form, you should be aiming with your feet. not your arm. I digress again.
But the major correlation, as I have not watched the video, but played ball golf for over 20 years. Footwork aims the ball or disc assuming the swing is good.