NLE - Non-Linear Editing - in this case, Premiere Pro is your NLE.
It looks like you are recording HDV.
If that is the case, you might want to record it back to the camera to be written to tape. That should not cause a generational loss. Just make sure to mute the audio track when you do it. That will give you a nice backup, and you can then capture the video again without a problem. It is time consuming, but it should be lossless.
If not, there are other fairly good codecs. Many cameras nowadays record to H.264 as an MP4. Depending on how much editing, color correction, stuff like that, you plan on doing later, you might just be happy exporting to 1920X1080 using square pixels (PAR 1.0) at a sufficiently high bit rate. Perhaps 25 or 30Mb/s would be sufficient, using a simple 1-pass VBR. That would probably look just fine for most video. It depends on what kind of training. If you are teaching with lots of fast motion, you may need to double up the bit rate.
H.264 is quite easy for a PC to edit, so it is what I would probably use. But a little experimentation on your part will determine if it is suitable for you.