Why vedioes are silent in my iphone?

Why vedioes are silent in my iphone?

Its a inbuilt speaker capacity

Probably your iPhone had come into contact with water and now that water has entered the headphone jack and is confusing the iPhone because of water's partial ability to conduct electricity.

Happened to me once. Leaved the phone overnight to dry and all was well. If not try leaving your phone in uncooked rice to absorb moisture. If this does not work send your phone in for inspection.

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