I suspect you are referring to a device without a keyboard. I find my YouTube experience much better on a laptop for access to these shortcuts: https://www.mrfd

I suspect you are referring to a device without a keyboard. I find my YouTube experience much better on a laptop for access to these shortcuts: https://www.mrfdev.com/youtube-keyboard-shortcuts https://www.mrfdev.com/youtube-keyboard-shortcuts To do what you're asking would be left arrow (back 5 seconds) and shift+comma (reduce playing speed). As a bonus you get extensions/add-ons that improve the whole experience. It's sad how (unsolvably?) lame YouTube is on a phone, once you get used to this.