I personally like to watch a lot of informational videos, I find this a good way to learn. One thing I do like though is being able to change the playback speed.
Sadly a lot of the Salesforce videos I watch are published through Vidyard, and for some reason Salesforce decide to not offer the option to change the playback speed via the video settings menu. There is good news though, and this comes in the form of hacking the video URL through the browser devtools.
Here’s a quick video demoing how to do it, but in short you want to add an extra query parameter to the video URL used. In the demo I add &speed=1.5 to the end video URL to enable me to watch the video at 1.5x speed.
I hope this helps you too.