They're not lying outright but they are being very misleading.

The SARS-CoV-1 vaccine they're referring to is a standard type vaccine where attenuated particles of the virus itself are used in the vaccine, and it was developed in 2003 or 2004.

The misleading part is they they're associating the mRNA shots with the standard ones with the intent of making people believe they've been using the process for 20 years. Moderna was formed in 2010 to perform research into the idea of using RNA to trick the body into kicking off an immune response. The company has one "vaccine" to its name so far - Spikevax - and it's the one authorized for emergency use against Covid-19.

"Past research" into the previous versions of SARS/MERS did not make it any quicker for them to create the "new" vaccine. They've been trying to find a suitable candidate for years.

mRNA technology has been researched for at least that long, which I assume is the research they're talking about. Most of that research wasn't on coronaviruses, but some of it was. As I'm aware, they determined SARS vaccines weren't worth it, because of bad side effects, limited function, and the general populace gained natural immunity on its own so the virus essentially evolved itself back into obscurity.

So, yes, propaganda, but as usual, with that dash of magic ingredient, truth. Then they can point to the research and, tada, it's true.

That's propaganda. The 'clot shots' aren't even approved yet.

Both new delivery vectors (viral vector and mRNA) needed some time to develop, but they were not developed especially for coronaviruses or with SARS in mind. They are delivery vectors that can get produced in huge amounts as soon as the RNA or DNA sequence of the targeted virus is known.

This makes these vaccines valuable in case of a biological war, they allow for an immediate reaction with millions of doses. But they were untested, and they need long term trials with small groups of volunteers. The "the end justifies the means" people at UN, CDC and FDA think that this takes too long and that it is ok to kill a million people with huge trials now because these vaccines can save the lives of hundreds of millions in the future.

Didn't all the animal test subjects die?

This is what you call a handwave. On old maps they would just write, "Here be dragons" or something to the same effect.