A mix of general and specific advice for you.
You need get in VERY early what the video will be about - before any branding etc etc.
This tells the viewer if its something they want to bother with.
When doing so you need to give them a reason to watch on - tell them what they will get out of the video.
Make sure you DELIVER what you said you would.
If what you want to say or show in a video takes 5 minutes, don't drag it out into a long video. (You seem to have this covered
)
As far as actual filming is concerned:
Does you camera have stabilisation? If so, turn it on.
If you are planning on doing a lot of walk around vlogging, invest in a gimbal
see this article to see what I am talking about
The best gimbals for your iPhone, GoPro, mirrorless camera or DSLR in 2021 | Digital Camera World
No need to buy anything really expensive. Just get one with decent stabilisation and don't worry about all the luxury features.
I see the camera jumps around a lot. e.g. a video where you are in a shop. This feels jarring to me as a viewer - try to be smoother when filming.
I find it interesting you have a video titled "HOW NOT TO BLOG VLOG VIDEO"
I wasn't able to listen to it as I have no speaker on this computer I on at the moment, so it might have been for a reason (other than showing of your guitar collection
) but I;d avoid the 'all your body in the frame thing' generally speaking. Stick mostly to upper body or shoulders & head - looking directly into the camera lens, to increase engagement. Humans naturally seek eye contact and when its missing it can feel wrong. Doesn't need to be constant eye contact of course, but there should be some.
Hope that helps
