Audio speedup either generates chipmunk voice or cuts phonemes. Neither is an acceptable substitute, especially if one has hearing or cognitive issues. Even at

Audio speedup either generates chipmunk voice or cuts phonemes. Neither is an acceptable substitute, especially if one has hearing or cognitive issues. Even at 2X audio speed, I can still be halfway down a page while you're finishing the first paragraph thanks to an ability to skim information for keywords. Personality is inescapable in a video presentation where either body or voice is present, unless the body and/or voice are computer generated. We are hard-wired to read body language or interpret inflection, even though we may be completely wrong. If you're relying on the user having headphones, that's a mistaken assumption. There are any number of reasons that a person may not have headphones at the moment or ever. I have my own office, so I don't need headphones and I don't use them outside of my own home, in general, because I need to be aware of what's happening in the environment. The UI for online video is pretty uniform across platforms. Yes, it sucks. To get a better UI with an actual, functioning scrub wheel, I would have to load it in Premiere or AfterEffects. However, the problem of chipmunk voice/missing phonemes applies just as much. Well-written print documents will generally include a summary near the top that can be skimmed for informational cues in seconds. Furthermore, a standard page can be scanned for the same informational cues to localize the information. You cannot say the same about video. I can't speak specifically to your Udemy class as I haven't taken it. However, printed course material can be re-read, taking in only the chunks that need to be re-read without having to remember a precise timecode and without having to spend much time in the preceding or following material.