Player Idle Animation Glitching Please Help

I'm having trouble involving my player's idle animation, whenever it's playing it does this weird vibration type glitch constantly and I don't know how to fix it. I left a video showing exactly what it does. I know this glitch occurred after I was playing around with the animator window, I also left a photo of my animator window. I'm somewhat new to Unity so I'm not exactly sure where my problem is.

https://imgur.com/a/XQxdQ0B
https://imgur.com/a/fylxPTG

 

It looks like it may be flicking to a new animation and then back again. While playing, keep your animation windows open to see what's currently playing.

 

Sorry for the late replay, my problem was actually just the idle animation itself. I looked at the animator window and it was just showing the idle animation playing, so I looked at the idle animation and it turned out I accidentally put an extra key by accident. Thanks for the help, this problem was really giving me a headache.

 

I had this problem. Click on the asset, click the animation tab, set the beginning of the animation to frame 2 instead of 1 (I use 0 for T pose).