This plugin is actually good https://addons.wpdiscuz.com/wpdiscuz -tenor-gifs-integration/ IF only it is unnecessarily added the watermark "tenor" on it.
Honestly speaking if you only copy paste the tenor link. It is still working without this plugin and on top of that we get a no watermark: 
Why in the world you should put the watermark there. I added it on my chart now I don't feel like buying it anymore -___-
You can use the CSS code is provided below:
.wpdiscuz-tenor-powered-by {
display: none;
}
Put the code in the Top Admin Bar > Customize > Additional CSS > "Additional CSS" textarea, save it, delete all caches and check again.
Please note all questions related to paid addons should be asked in the gVectors.com forum. Here we only support issues related to the free wpDiscuz plugin.
