Aldon Smith: 'Not Me' In Blunt Smoking Video

Aldon Smith says it's NOT him in a Periscope video that appears to show the embattled NFL star smoking a blunt.

The video surfaced over the weekend -- and while you NEVER see the man's face in the footage -- you can hear a voice that sounds like Smith ... talking about a "fire up session."

At one point in the video, you hear the man's voice say, "They don't know it's me. It's not like I put 'Aldon Smith.'"

Also, important to note, Smith has appeared on other videos posted by the same Periscope user.

The NFL has confirmed it's investigating the video.

But moments ago, Smith finally spoke out on Twitter -- saying, "Good try, not me."