I am visually impaired so I am far from average, but for me, video tutorials are hell on earth. I remember having to pause and re-start a video like 20-ish times until I understood a sentence of the speaker because he had an unfamiliar accent. It also forces me to a certain pace which might be painfully slow or blindingly fast. Or both in the same video. Give me something to read, access to dict.leo.org and preferably something to test with and I'm great!
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I am not a native speaker. Please contact me if I made grammatical mistakes in the posting above.
Penguins cannot fly because what cannot fly cannot crash!