I very recently had two ideas for potential SCPs however I don't know if something like them has already been done.
The first idea is a sort of "God Machine" that would possess a vast knowledge of just about everything and it would be implied that he is the making of a higher power. It's an incredibly rough idea right now and I'm very open to ways of changing what little there is and suggestions on where to go with it.
The other is a bit more fleshed out. It is a standard T-120 VHS tape that would normally record up to 6 hours of video. On the tape is a recording of a man with no time stamp present. It starts out the same every time, with him pressing the recording button on a camera, with just his torso in view. He then backs away so he fits in frame. Then maybe he'd sit down or something and address the viewer in some way, maybe ask them a question or request that they ask him something. The viewer can take part or do nothing. Either way the man will have a different response. So it's basically a pre-recorded message that isn't so pre-recorded. I haven't gone much further into thinking about what would happen with this idea I think an interview log with this SCP would be an important part.
Let me know what you think, good or bad. I want to hear it. Especially let me know if these are too similar to already existing SCPs.