Hi,
at first, I guess good videos for starters, I would miss some essentials like how to enter coordinates, using object snap, ... before going into edit blocks. But as always, the order which ones first ... as well as hold them attractive ... keep the user watching instead of getting them bored ... not easy 
Video 1 ... About Blocks:
Statement in text above the video:
>> Because blocks are locked, instances of blocks are
>> always consistent across projects.
My opinion:
Not true, as I define "projects" as a set of drawings, but a block "TABLE" in a drawing A can be different to a block "TABLE" in drawing B, so the wording "consistent across projects" is not guaranteed.
Also "locked" sounds for me like "not changeable" ... you can modify blocks, you can replace blocks (same name, other content), so "locked" (for my limited English language skills) sounds incorrect.
Statement in the video (at about 1:00):
>> Blocks can not be accidentally stretched
True, but the bad sample in the video is that you have dynamic blocks selected at that time ... and the selected blocks have stretch parameters, a bit irritating
Video 2 ... Creating Layers:
That's not really incorrect, but from the practice side of CAD ... in most cases you start a hole with the centerline
Also not that beautiful: the dense of hidden linetype does not fit to the dense of the center linetype. In your sample the hidden should have a bigger ltscale.
Video 5 ... Update Blocks:
Statement above video:
>> Use the Insert Block dialog box to insert the block in the DWG file into a drawing.
My opinion:
"the block in the dwg-file" is not correct, as in the file L-DESK.DWG does not have "a block in the dwg-file".
Should be something like "insert the dwg as block into another drawing"
Just my 2c, - alfred -
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2025
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(not an Autodesk consultant)