I got a plastic vcr adapter stuck, I just cant loose the tape, how can I get it out

There are several possible ways to remove a tape. This varies widely on what type of VCR design you have. Some types require the removal of the entire deck assembly to get the tape out. Others have an open load motor controlled by belts that can be moved slowly by hand to roll back the mechanism and free the tape. This type is probably the easiest. Most problems of this type require someone with a technical knowledge of how they work or a very clever person that has a good grasp of mechanical things. There is always the risk of getting the gear timing off if you remove the cassette load assembly.

If the tape is that important, you need someone who is familiar with vcr's and how they work, or technician. There is no easy way to explain what must be done to get the tape out in one piece.