On The Fly YouTube Embeds creates a page on your site that will play any YouTube video based on the requested URL without having to create a new page for each individual video.
You’re then able to view any YouTube video on your site simply by navigating to a URL that includes a YouTube video ID.
This is useful for sites that want to host a lot of video content on YouTube, but provide a simple way for users to view them without leaving their site.
For example, if you were to navigate to something like <code>http://example.com/video/jOyFDvWf83w/</code> it would show you the YouTube video with the ID of <code>jOyFDvWf83w</code>
You could also replace that video ID in the URL with any other YouTube video ID and it’ll work as well.
You can play any YouTube video on your site without having to manually create a new page for it. Point visitors to the appropriate URL and it just works.

On The Fly YouTube Embeds

Creates a page on your site that will play any YouTube video based on the requested URL without having to create a new page for each individual video.

Funk Design

The DQRS (DynamicQRSaver) generates a dynamic QR-Code. This QR-Code / the URL gets saved in the WordPress-Database and can be changed later on. 
Simply edit the QR-Code URL in the Backend-Tab.
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Visit the developer and designer of this awsome plugin at <a href="http://funk.design/" title="Your favorite webdesigner" rel="nofollow ugc">Funk.design</a>

Dynamic QR Code URL Saver

Idea is great because so many dead liks are the and some qr codes will e printed as well.

I red that pretty links offer this but can't find this option there.
I would love to have an export there and best case directly from post editor ;)

I would like to believe the best ;)

Generates a dynamic QR-Code, which can be saved and edited later, even if the QR Code was printed. Very easy to install and use. Share smartly!

On The Fly YouTube Embeds vs Dynamic QR Code URL Saver