In the video, the speaker said:
Vedanta is about Atma (the Self). ... the next word is Sakshi (Witness) ... What
is the Self? Is it this bundle of flesh and blood? Is this person in
the body? The mind, the intellect, the memory, the likes and dislikes,
the knowledge, the person I think I am - is that the Self? Or is it
something beyond that? ...
Buddhism teaches Anatta (not self) and the Nibbana is the final goal. You can't find them in Advaita Vedanta. Buddism also has Noble Eightfold Path with a clear set of instructions as to how to attain Nibbana. In my opinion, it is just more than semantics. The only way to be sure is to study and practice both.