MPC-HC hanged for a couple of seconds!

Hi. I was browsing a folder with lots of videos, I was browsing through MPC-HC with my mouse's "front-back" buttons, and when I let a video play, MPC-HC froze/hanged for ~5 seconds with a "buuzzzzzrrrr" sound in my headphones. Windows did not freze, and my cpu usage were 10%. It happened only once. But it also happened 2 years ago when I did the same thing (back on ancient win 7). What happened? Could that freze do something bad to my video file?

Nothing to worry about. Files are only read when playing them, they are never modified.

This is usually what happens when the graphics driver hangs and then recovers(TDR). Nothing to worry about.