Jerky Video Playback on CBS

Description of the issue:
Video playback jerks on cbs.com.
Does not happen on YouTube.
Shields up, shields down, doesn’t matter.
Hardware acceleration on or off doesn’t help.
Does not happen immediately, but typically after a few minutes. Once it starts, it can stutter every few seconds. Audio stutters at the same time.

Video playback on CBS is fine in Chrome.

Expected result:
Videos should play cleanly with at least one of those shields / hardware acceleration options, since they do in Chrome.

Brave Version:
0.70.123

Additional Information:
macOS 10.13.6 (17G6030)