Histogram is extremely skewed to the left
I think there are a few "easy wins" here.


You might add more bins - you are already using the bin setting. Just add something high like 100 or even 1000 to get a first feeling for the data
You can define the range of your bins. For example you could set the range with a list of two entries range = [0, 5000] as an additional parameter
You can consider not showing all data- maybe movies with a few ratings or movies with a lot are not what you focus on. You can use the range argument from point two to limit the plot to the region interesting for you.
You can try a cumulative and normed plot cumulative = True, normed = True this can be very useful to get a better estimate on statements like "80% of movies have less than 100 ratings" - for cumulative plots I recommend a very large number of bins.


I hope this helps and let me know if something is unclear