Fatal error: Cannot use object of type stdClass as array in

CodeIgniter returns result rows as objects, not arrays. From the user guide:

result()

---

This function returns the query result as an array of objects, or an empty array on failure.

You'll have to access the fields using the following notation:

foreach ($getvidids->result() as $row) {
    $vidid = $row->videoid;
}

if you really want an array instead you can use:

$getvidids->result_array()

which would return the same information as an associative array.