If it’s not already, that PDF should be the minimum that’s in the box with the I1.
People learn different ways. Videos are good to watch but harder to work alongside because you always have to pause to do your own thing. They are good for demonstrating what can be done, or as a “this is what to expect” along side text. Text-based or text and pictures, which could be taken from the video, allow someone to have the steps in front of them and then they can follow at their own pace.
Some people will want to access stuff through a browser. Some will want to use their iPhone or iPad. Some maybe both. For example, I can see a setup where I’m hooked into Garageband on my Mac and want the tutorials on my iPad. Or vice versa.
Of course it depends what you trying to get across and to what level of audience. There are beginners, both to music and instruments. There are beginners to parts of it. For example, I knew how to play a bit of guitar before I got my I1. I knew that midi and synths existed, but not many details. So some of the concepts need to be explained. For example, lots of people on this forum didn’t appreciate that the I1 is a midi controller or if they did, what did that mean.
If you can’t go into detail about some of the things that aren’t I1 specific, at least have links to sites where we can learn at least the basics.
Then of course you have the intermediate to advanced user who understands and can use all the options but needs to know how the I1 does it and where it fits in.