How do I fix slow-motion streaming videos on my phone to go back to normal speed?

[RachBM]

When I play any video on my phone, it plays in slow motion, and not at a regular pace. How do I get my videos back to normal playing pace?

 

[B. Diddy]

Welcome to Android Central! Which phone? Is this only streaming videos (i.e., over the web), or also any video file saved to the phone's storage? If it's only streaming, on which streaming services do you see this behavior?