Here is the very cool yet brief excerpt of the astronomer who uploaded this video:

On 17.03.2016 i was observing and filming Jupiter with my Skywatcher Newton 200/1000 Telescope. The seeing was not the best, so i hesitated to process the Videos. Nevertheless 10 days later i looked through the Videos and i found this strange light spot that appeared for less than one second on the edge of the planetary disc. Thinking back to Shoemaker-Levy 9, my only explanation for this is an asteroid or comet that enters Jupiters high atmosphere and burned up/explode very fast.

On a side note on page one we described Jupiter as the largest known planet in the solar system.  If planet x is really there somewhere past Pluto it could be the largest planet.

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thanks to iflscience.com for the great info