У вашего броузера проблема в совместимости с HTML5
In part 1 we look at applying a mask to your footage in order to obscure a face or object with a mosaic effect (could also be substituted for a blur effect).
This is often required when working with footage to respect the privacy of others, for legal reasons or simply to block some personal details such as an address or phone number.
In part 2 we look at key framing this mask to allow it to move around when your object / subject moves around the frame.
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