Suggestion when evaluating carry on luggage: Provide external dimensions (including wheels) , capacity in liters, and empty weight of bag. All three major considerations when using carry ons internationally as usually 21" is max height and usa/canada/mexico allowances of 22" inches are jot accepted as carryon. As well, when evaluating backpacks/personal item bags, most international and budget airlines have a max height limit of 16-17" and so a 45-50 ltr back pack is not an allowable personal bag
While they don't mention that in the video, it is available on the review page linked from the description in the "Technical Details" section for pretty much all packhacker reviews FYI
I'm so annoyed with companies releasing weirdly large carry ons, this "small" version is barely within common dimensions and entirely too large for airlines with ""small" carry on requirements. They claim the small fits in all major airlines but I can think of two MAJOR airlines off the top of my head that demand a depth of less than 9 inches. If you're buying a new bag anyway, why take the chance if the goal is carry on? Annoying enough it turns me away from the brand as a whole.