This video goes into way more detail than the earlier Digital Modes video. Yes, it’s 45 minutes long, so set aside some time to really absorb the information in this video introduction. After you view the video, study of the ARRL General Class License Manual should be a breeze.
The link referred to in the video takes you to a video I made earlier that shows a complete PSK-31 QSO using Ham Radio Deluxe / DM-780. When you have finished watching these videos, you can return to the main video list by clicking here.