I didn’t see in the video where you talk about changing tire sizes. It doesn’t matter, do you think 12mm shorter or 6mm bigger makes much difference (just under 1/2 inch shorter total tire height or just over 1/4 inchtaller? As mentioned, the speedo is about 3 miles optimistic currently at 70mph.
I googled your tire size. Theres plenty of brands out there with that size.
I would stick with the size that came with the car
Can you tell me why you would stick with 205 60 15? 195 65 15 is 6mm taller, 195 60 15 is 12mm shorter. The problem is there aren’t any other all season radials rated as high in the snow and I don’t want to put snow tires on the car in the winter, I already do that with my Accord and I don’t want to keep two sets of snow tires. Subarus are good in the snow anyway but the hankook h727 is amazing in the snow and the best all around tire I’ve ever had, and I’ve had a bunch on there, it has 228,000 miles and I bought it new.
Honestly at most I would think the only thing you would notice would be with the speedo, I don’t think it would harm the car at all as long as you did all 4 tires at the same time.