One of the nice things about having a lot of different demonstrations to watch is that you sometimes pick up details from one that another might miss or take for granted. Additionally, there is more than one way to stitch (and other things too). Most will just show you one way to do a thing: Not right or wrong, just different! Some things, for example that I do differently from this video are:
1. When attaching thread to the needles, pierce the thread twice, and if the type of thread calls for it put a dab of glue on the "knot" to keep it an inch or so back from the eye of the needle. When the knot moves up right next to the needle eye, it can bunch up making it bulkier and harder to pull through.
2. When inserting the second needle through the leather, simultaneously pull back the first thread a little bit to help ensure that you're not piercing it with the second needle. That can be a real pain in the neck to have to try to un-do when it happens.
3. When starting a line of stitches, if the starting point will be visible start 2-3 holes in and do a "backstitch" the will match what you normally do at the end of a line. It's not necessary, but at least both ends are symmetrical.
The point being, some videos (and for that matter printed sources) are certainly easier to follow than others very few if any are totally complete. Tips and tricks can be picked up from multiple sources. Furthermore, instruction that totally makes sense to one person might leave another confused, but that second person might find another source that just clicks! As much as it is sad to say, also, there are certain videos that I've seen that I just can't watch. Sometimes the video quality or angles are impossible to see what you want, and once in awhile I just can't listen to the presenter due to an accent that I just can't get through, audio quality, or whatever. Multiple options are a good thing!!