It cuts off in the last part of the irregular verb SER. You'll find that in the second video, where she also gives some ser examples.
Two possible mistakes that she makes: Se LLAMA for a name of a past pet (should be SE LLAMABA)
Also, she calls "accents" "tildes"... Please call them accents.
It might be a good idea to write down some of the sentences that you see here in your notes so that you have the endings AND vocab that we will do in context all in one place. She does give a lot of examples though, so if you get it after writing down a few examples, just copy down new words/important phrases. You don´t have to watch every example either if you don´t need to.
Source: YouTube/ SpanishDict
This is part 2 of the video above. I would write down a couple of the ser sentences for your own benefit.
You can also take her up on her extra help at the end of the video!!! :-D
Source: YouTube/ SpanishDict