No. of Recommendations: 0
Depends on the airline. If you buy the cheapest ticket or on a cut-rate airline that makes much of its revenue from baggage charges, you'll run a real risk. For other airlines and/or a bit higher-priced ticket, it's rarely an issue, in my experience. The YouTube videos often have scary titles intended to get you to watch them, and then buy something they recommend to solve the (nonexistent) problem.
Regardless, we travel with international-sized carry-ons exclusively, unless I'm bringing extra sports equipment. I even went one step further recently and bought a 35-liter (capacity) Osprey travel backpack that holds a bit more than my (two-wheeled) rollaboard (30 liter) yet fits in the same dimensions. Even with inline-skate wheels, the rollaboard is somewhat unwieldy (to me) on narrow European sidewalks and cobblestones.
I used the backpack on our trip to Hawaii this past week, and I like it a lot. I'll use it for our 7-week trip to Europe this spring.