You can view some profiles (authwall for others) and some show all content (tried it out with bbc and forbes), others drop relatively recent content while some others only show ancient content from a year or more ago.

The latter two were when I tried opening the twitter pages for some smaller podcasts I follow.

As for dictionary definitions, youre right about what the first definition is, but many recognize what I pointed out (insects as animals). Definitions other than the first aren’t wrong, they reflect that people use words in ways other than biologists do.

anything that lives and moves, including people, birds, etc.: Humans, insects, reptiles, birds, and mammals are all animals. Cambridge dictionary

Any living creature other than a human being can be referred to as an animal. Collins

any such living thing other than a human being. Dictionary.com

Not the categories biologists use but in the sentence immediately after you defer to the taxonomic classification system, the system biologists use :)

So she takes “animal” to mean something like “non-human critters”. Not everyone uses words intending them to fit the technical meanings e.g biologists give.