First of all, the OCer did not fail to ID. He offered to ID. Second of all, under Texas law you only have to ID if you are arrested, not if you are simply asked or detained. Third of all, you are only required to verbally ID, you are not required to provide a DL or state-issued ID.
Unfortunately it’s not unusual for cops to illegally erase your video to hide their actions. Just recently a cop erased another person’s video, only the vid was simultaneously being uploaded to the cloud, so even though the cops got the vid on the phone, they didn’t get the one on the cloud server and their actions of trying to cover up their behavior were found out.