What's the query?
Embed information from a PHP library call "Embed" https://github.com/oscarotero/Embed
Elgg doesn't provide a general purpose cache API, so you'll need to put one in your plugin for now. I'd avoid Stash because you could get version conflicts with core. Cache_Lite (use composer install) is a very old standby.
Ok, works and only load material css in just in The Wire page. But I have the same problem with the styles just in The Wire. There any way that is loaded only in the section of the post?

You have to use CSS selectors to limit changes to the post.
.thewire-post .elgg-content a { /* links within wire posts */ }
And that I should place in materialize css, extension view or hook?
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