Video Streaming Not Working

What works:
- Netflix
- HBO Go
- YouTube
- Apps that cache the whole file, such as Clover and Overchan (both are 4chan browers)

What doesn't:
- HTML5 videos (Firefox, stock, Tint, and Chrome have been attempted)
- Apps that do not cache the whole file
- Streaming intents that the stock video player registers to receive

Note the I have the Sport variant, running on 5.0 Lollipop.

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