holoviz

During a recent Dask tutorial someone asked "Can Datashader run on Dask?" and I was pleased.

It would be good to have an easy-to-run example that was advertised Datashader from Dask resources. Often we do this in examples.dask.org . Is there an example that makes sense to deploy there?

Annotations don't look good in a Heatmap with a large amount of data and those that are rendered in the high values range are barely visible with the default color map. Heatmaps generated with the Bokeh backend don't have annotations by default.

See this example taken from the reference gallery:
![image](https://user-images.githubusercontent.com/35924738/140487561-3cdb38ea-8694-4328-ab9f-bfdda

ALL software version info

Panel version '0.12.6'
Python 3.9.2
OS Mac Monterey

Description of expected behavior and the observed behavior

when a given video URL contains query parameter, the URL is not recognized as an URL

Complete, minimal, self-contained example code that reproduces the issue

import panel as pn
Video = pn.pane.Video
 url="https://www.videoserve

As far as I can tell, the Pandas .plot() API does not have a way to change the background color without dropping down to matplotlib. hvPlot appears to inherit this the same limitation. We can of course do .opts(bgcolor='black'), but I've found that in many examples that's the only use of .opts I have to resort to

Is your feature request related to a problem? Please describe.

I’m trying to create a custom grid (grid lines). I’ve seen the Cartopy graticules example in the Geoviews Geometries documentation 1:

graticules = cf.NaturalEarthFeature(
category='physical',
name='graticules_30',
scale='110m')
...
I’d like to create a grid that matches a web mercator web map tile grid at a