and for the video on docsend, its not a paid wall - just put in your email and you can view: https://docsend.com/view/hxra3rnfevsytg4v
The docsend video requires an email address, and rejects "a@example.com" as fake, so it wants a real email address, which implies to me you want to collect it for marketing / lead generation purposes.
Is there any reason you can't put a one or two minute "example" meditation video on YouTube?
its hard to convey the full vibe in 2 minutes - for a couple explanation videos we do have on youtube check out these: