You can add a Video to My List by opening a video's page and clicking the My List option under the video's title. If the My List option has a + symbol beside it, then this video is not currently saved to My List. If the video has been successfully added to My List a checkmark will be next to the My List option.
You can add a Show to My List by opening the show's page and clicking the My List option. If the My List option has a + symbol beside it, then this show is not currently saved to My List. If the show has been successfully added to My List a checkmark will be next to the My List option.
To confirm a video or show is on My List, you can select the My List option from the menu along the bottom of the screen to see which videos and shows are currently saved.