Clutch going bad it not working?

Just recently installed a new clutch and put the transmission back on. I shift the truck into first gear and it does not move. I do hear what sounds like grinding when I release clutch. What could the problem be? I used a clutch alignment tool to align the clutch before putting transmission in. Is it possible I was given the wrong clutch plate and disc? Is it possible the input shaft is not quite matched up to the clutch plate even though the transmission is fully mounted?

The clutch plate fits perfectly over the imput shaft. Reinstalled the tranny still no rotation out of the out put shaft. Thinking something may have broke in the transmission. As I drained the transmission there are metal pieces attached to the drain bolt.

Steve that looks like my transmission. I started the truck and recorded a video of what it is doing. I feel as the the input shaft is not splined into the clutch plate. I think it is to far back. Away from the engine. Would that be an indicator that there is something internally wrong?

Here is the video.

Update, I did pull the transmission and a bearing came apart, the gears are all messed up.

I love that site, I am saving for one.

I've replaced the clutch master and slave cylinder on my truck. While bleeding the line I'll get some air and fluid. After a couple times I'll get nothing. No air or fluid. Am I missing something or is this normal? Please help. I'm completely lost. Thanks

Okay, update: Got the lines bled and all the air out. Now the clutch pedal is so stiff I cant push it down at all. And can't get it to go in any gear. I'm completely lost. Please help

Okay, I'll sure check that. But not 100% sure on how to check if it's in right or not. I've never done clutches before. This is new territory for me.

My 89 cheyenne with the 4.3 is sittin in my yard and its makin me sad what was happening was when I first bought the truck the clutch was great then I started to notice I was loosing fluid in the clutch master cylinder, well after I topped it off thats where the problems started, I started to loose my pedal and it got to the point it wouldnt go into gear, so I went under and opened the bleeder on the slave cylinder to try to get the air out and thats when I lost my pedal completely and it wouldnt build up pressure anymore, my question is before I started to loose my pedal my clutch was great no slipping no problem changing gears, nothing does this sound like a master cylinder problem or something else. Any help would be greatly appreciated