I doubt that anyone could find a more comprensive description of any product in any industry, anywhere.
Alex Dykes's Car reviews are you're equal but that's it among reviewers/presenters/sales staff.
I doubt that even the Sennheiser people could put things into context or perspective as well as you've just done.
If I'm the Sennheiser's Global Sales Director I'd be training all sales people using your videos and I'd be hiring you to do Videos on every single product in production.
Nice going,
Tony in Michigan