Video player fails to load on espnfc.com even with Adtracker disabled and flash enabled

[srirambv]

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  Video player fails to load on espnfc.com even with Adtracker disabled and flash enabled

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Windows 10 x64

• Brave Version (revision SHA):
  Brave 0.17.7
  rev 21cf3d1
  Muon 4.1.3

• Steps to reproduce:

  1. Visit http://www.espnfc.com/ and open any article with video in it
  2. Video player fails to load video
  3. Disable Ad/Tracker, Fingerprint Protection and enable flash, still video doesn't load
  4. Turn off Shields, shows flash placeholder, allow once plays the pre-roll ad and then plays the video

• Actual result:
  Video player fails to load on espnfc.com even with Adtracker disabled and flash enabled

• Expected result:
  Video should play

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  Yes

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:
  

• Any related issues:
  ESPN video player doesn't work when flash is installed and enabled #4572
  cc: @diracdeltas @lukemulks