A possible concise summary is:
Rhett and Link tell the story of how they discovered that their dogs, Barbara and Jpeg, are siblings from the same litter of Maltipoo puppies. They show a video of the dogs meeting for the first time in over a year and take a family portrait. They also promote their new channel and merchandise.
Here are some possible key facts extracted from the text:
1. Rhett McLaughlin is a YouTube star who adopted a Maltipoo puppy named Barbara from a place that also posted a TMZ article about him.
2. Saagar is a new member of the Mythical Crew who also adopted a Maltipoo puppy named Jpeg from the same place as Rhett, but did not know it until his ex-girlfriend told him.
3. Barbara and Jpeg are siblings from the same litter of puppies, and they reunited for the first time in over a year on the show Good Mythical Morning.
4. Link Neal is Rhett's co-host and friend who also has a dog, but not from the same place as Rhett and Saagar.
5. The show Good Mythical Morning features segments such as spinning the Wheel of Mythicality, collecting weird shaped fruits and vegetables, and promoting their other channel This Is Mythical.