Choppy/Slow Video - Some Slow Emulation

[Strider]

After many hours troubleshooting and crawling all over Google, I finally decided it's time to just ask for help on this one...  

I only really emulate GameCube, and Dolphin generally works great, unless the game has video playback. The video is almost always choppy, as is the emulation once you're in the game, but it only seems to happen in games with videos (like Bink).

I recorded a short video sample to make this easier: https://vimeo.com/739260702

I have activated and deactivated every setting, tried all the available back-end render options, adjusting CPU/emulation speeds, deleted the settings to restore it all to default, nothing I do seems to fix it. It's either like the video, choppy, or doesn't work at all.

So in a nutshell...

It seems to happen in all games with video playback, and nothing I do seems to correct it. Perhaps my frustration is just blinding me to the obvious...

Here is my basic hardware info:

Windows 10 Pro
Ryzen 3600X
AMD RX 580 8GB
32GB 3200 DDR4
Asus TUF Gaming Pro B450
On-board Realtek Audio (6.0.1.8666)
Dolphin Version: 5.0-16793

Any advice is greatly appreciated, and thank you!