Make sure you are using subtitles. It’s the easiest place to start.
You can see how I manage closed captions/subtitles on my YouTube playlist here: https://tolisdokianos.video/WhyUseSubtitles/CC
WARNING – Avoid using YouTube generated automated subtitles. But don’t switch off closed captions/subtitles all together. You need to have manual captions for your videos even in your own native language. Make the effort to do this.
Delete the automated captions. But before you do, you may want to download the automated captions into text format as it may save you time transcribing them. Plus they may give you some comic relief when you see how YouTube transcribes your voice to text.