Embed loads the swf completion event.

before embed loads the swf file, the embed panel is black, that is, nothing is displayed, and the swf file is not displayed until the swf file is loaded. In the process of loading swf, I hope to give the user a prompt "loading" on the panel to achieve a better user experience. What should I do, such as Tencent Video:

Swf embed
Mar.24,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b37cdc-2ae08.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b37cdc-2ae08.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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