Most of us at age fifty are wearing a progressive pair of lenses or maybe a line bifocal. These are designed for distance viewing, which is usually a good eight feet or further, and the bottom part is designed for reading at approximately sixteen inches.
Yes we can slow it down! While you are learning to play a piece of music with your Youtube backup band you can adjust the playback speed to slow, slower and slowest.
For the music that plays from a YouTube Video look at the bottom bar of the YouTube display screen. There is a place for you to play and stop. There is also a volume and time remaining display. Move over to the right, and see that? There is also a Settings cog.