I wasn’t familiar with this website so I created an X profile to check. Here’s a screen recording. It is edited to not show the first “salute”.

You see a portion of the second one where his back is turned but if I hadn’t seen the original I would have more doubts on whether that was the Sieg Heil

I created an X account just to look at this. Here’s a screen recording. It cuts out the first one and you only see a portion of the second salute.

I wasn’t sure what to expect when I saw RFK Jr. had highlights about animals. Thankfully, it’s just dogs being subjected to his campaign gear though