Nice job on the video. Unless you have put one of these together, you can't appreciate fully the time and effort it takes to complete the job.
In order to make a clickable link, put a word such as "click" in your text, highlight the word and then click on the chain link icon in the tool bar. You'll get a window where you can enter your URL. Close the window and that's all there is to it. It won't work while you are in the editing mode, but it will when you post.
If I may, I'll make a couple of suggestions for your sound voice-over track. There are pops and hum. The pops can be decreased by talking across the mike rather than into it, and/or adding a pop filter. A very effective pop filter is take a piece of panty hose material, stretch it in an embroidery hoop and place the microphone about two inches behind the filter.
The hum can be reduced by applying the equalizer filter in Studio and attenuating the frequencies below 100 htz. If you have S 11 Ultimate, the Soundsoap plugin works very well for noise and hum.
Enjoyed seeing your work. I can relate to this, as a long time ago I was in a marching band. I didn't like it, but it was a requirement in order to play in the concert band.
Don