Using camtasia 9 for editing videos recorded on OBS. But the start always comes out with a crappy image, check this out .... https://youtu.be/y7MdBfE6mRY
You will notice a black crappy changeover from intro to video.
Was this recorded as a live stream? looks like a signal loss. Looks like what a sat. feed does when it breaks up. Not sure what file type you used, but it could be 1. a corrupted file 2. a dissolve that for whatever reason isn't isn't getting rendered. 3. sometimes the head and tail of a video can be clipped if there isn't enough footage. Not familiar with OBS other than it's open source and free so it could be many things. You used a c920. Sometimes the c920 can interfere have issues with computer settings or the speed of a computer. To me it looks like a computer(OBS or memory) combined with the webcam lost part of your signal.