I was researching Tektro adapters and I came across an informative PDF which I uploaded here https://img1.wsimg.com/blobby/go/92e...19s_680070.PDF

At the bottom of the PDF, I saw links to a whopping fourteen amazingly helpful YouTube videos.

Here are some of the more helpful examples:

Disc Brake Pad Replacement: https://www.youtube.com/watch?v=YHhK...LIbpRWF9Af8uZF

Hydraulic Disc Brake Bleed Instructions: https://www.youtube.com/watch?v=q0Sv...LIbpRWF9Af8uZF

Hydraulic Disc Brake Caliper Replacement: https://www.youtube.com/watch?v=gmuo...LIbpRWF9Af8uZF

Hydraulic Disc Brake Installation and Setup: https://www.youtube.com/watch?v=ikgK...LIbpRWF9Af8uZF

Hydraulic Brake Caliper (with Banjo Fitting) Replacement: https://www.youtube.com/watch?v=tV3F...LIbpRWF9Af8uZF

Shorten Hydraulic Brake Hoses: https://www.youtube.com/watch?v=PywQ...LIbpRWF9Af8uZF

Hydraulic Disc Brake Lever Replacement: https://www.youtube.com/watch?v=iA_e...LIbpRWF9Af8uZF

As an added bonus, I just uploaded the links to all of the small parts that I could find for the Tektro Dorado HD-E710 http://www.tektro.com/products.php?p=35 on my website https://police-ebikes.com/brake-small-parts, although I have yet to find the link to a spare brake lever for a Tektro Dorado HD-E710.