OT: in nearly every prior discussion of this, people mention that when they do watch YouTube without an ad blocker they get frequent long ad breaks. I occasion

OT: in nearly every prior discussion of this, people mention that when they do watch YouTube without an ad blocker they get frequent long ad breaks. I occasionally watch on a device like an Amazon Fire Stick or an XFinity Flex which does not have an ad blocker, and so I too then have my videos interrupted by ads--but the ads YouTube gives me are mostly 15 seconds, and most of them bring up a "skip ads" button after 5 seconds. Usually the longer ads also offer the skip button after 5 seconds. Some of the ad breaks contain 2 ads, but if the first one offers the skip button it skips the rest of the first ad and also the second ad. For me then it is not really making me spend much time on ads. That raises the question of why am I mostly getting short ads with a skip after 5 seconds, while apparently many others here got long TV-like ad breaks? Do they run different lengths ads on different categories of content, and I just mostly watch the kind that gets short ads?