XF 1.2 Server Error Log

Tried to post a 3 minute video on to my forum and I received the following message:

Zend_Db_Statement_Mysqli_Exception: Mysqli prepare error: Table './bicycleclassifieds/xf_search_index' is marked as crashed and should be repaired - library/Zend/Db/Statement/Mysqli.php:77
Generated By: admin, 11 minutes ago

I successfully posted a video a few minutes before I received this error. Not sure what to make of it.