Completely different.
But when I watched it in context, it looked like a man putting a hand on his heart and then proffering his thanks to the audience.
My belief is that it was most likely not a nazi salute and is not relevant evidence in the important task of assessing Musk's political stances.
>"I'm sorry for that tweet or post," Musk said Wednesday. "It was foolish of me."
He has famously thumbs-ed up significant chunks of such content and in the event mentioned here replied to an explicit statement (as outlined about) as being "the actual truth".
See, eg: https://www.bbc.com/news/world-us-canada-67446800
He is an unquestionable fan of Nazi like content, many will shrug it off as his grandfather was an actual Nazi fan (having to move from Canada(?) to South Africa because of such beliefs), and his uncle (IIRC, certainly a close family relative) was a senior member of the South African apartheid government.
Your belief is incorrect
Terrible branding for Tesla of him to singlehandedly permanently alienate the majority of his customer base.