Fedora includes incomplete video codecs that can’t use GPU acceleration. This forces the CPU to do the decoding. Fedora claims it’s because of imaginary “patent issues” due to its IBM backing. You can install the correct ones from RPM Fusion, but it’s an extra step and it’s not made clear that this is even a problem. You might notice only after you wonder why you have such high CPU temperatures while doing basic things like browsing the web.