Media Pending, Premiere refuses to play/scrub video then crashes
I've been having this issue with Premiere Pro CC v13.0 for a while now where I start up the program, load a project and about 2min into editing the video playback will start to lag. It lags for a while then the play button won't work on either the sequence or the source screens and then the program crashes. It seems to be triggered by certain source files since I just did a separate project start to finish no problems. I recorded the issue, link below.
At first I thought it was the HDD so I replaced the HDD but that didn't solve the problem. Then I thought it might be corrupt source files, but the files seem to play fine in windows media player. My next theory is the GPU but games like Overwatch and Diablo II are running just fine and I can render and work on most of my other projects without issue.
I've tried locating a crash log to find an error code but Premiere seems to not be generating crash logs.
I'm fairly certain it's hardware related but I'm just not sure what to replace. I'm going to borrow a GPU this weekend to troubleshoot but I'd like your perspectives on the issue in the meantime. Everything is up to date (drivers, premiere & windows).

