webpack: Also optimize dsgvo-video-embed
webpack: Also optimize dsgvo-video-embed

We use our own fork and it doesn't look trivial to always build
optimized code. Just use the source and optimize it in webpack.

liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin