Old video links not working

[bijumk1]

Recently I upgraded my mybb from 1.8.5 to 1.8.31 and the old video links are showing the code like

[video=youtube]https://...youtube.com/watch?v=XXXXX[/video]

No videos are shown.

If we edit the post the editing window displays the video, but if we repost it again the link is showing.

Please guide me to solve the problem

[bijumk1]

One word filter was the problem. when I removed the rule, it is working fine