Improve video quality handling

Video qualities are a mess. Here is a table (certainly not the table!). Now, couple of feature ideas to improve the UX:

1. According to that table, HD = 720p and Full HD = 1080p. However this script currently implements HD = 1080p.

2. Looking at the naming of the RSS feeds, it seems that currently the Video Portal uses the following "naming":

1920x1080 =  High  = 1080p = Full HD
1280x720  = Medium = 720p  = HD
 640x360  =  Low   = 360p  = ?? (not SD, that would be 480p)

Implementing the keywords "high", "medium", "low" with this mapping would be nice.

3. As feedback to the user, print the video quality that is being used to STDOUT.