Need help.Is this a throwout bearing noise?

[Billy2015GT]

Started hearing this chattering a few day ago and its been getting very loud..The car shifts fine and the chattering isn’t so loud when pressing down on the clutch pedal..It looks like I’ll be having the transmission dropped, but I’d like to get some help on here first what you think this might be..Thanks.

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[NGOT8R]

New clutch installed? There will be some gear rollover noise. I have some in my car. It does away when the clutch is pushed in, just as yours does in your video. I will say that the last video you posted almost sounds like a sticker on the driveshaft has come loose and it flapping against the transmission tunnel.