Video blog to showcase new features

[yurishkuro]

I was watching this Kiali demo, and thinking to myself - it would be nice to have a section on the website that demos various features of Jaeger. For example, we have recordings of the HotROD demo (eg at CNCF seminar and Red Hat community series) that go through many basic features, however, those presentations are pretty long and don't cover recently released features. I think a list of shorter videos, ~5min each, dedicated to a single feature, would be much better and easier to consume.

cc @jaegertracing/jaeger-maintainers @tiffon @jpkrohling