MAJOR video generator overhaul

[Divocaak]

• [x] video element objects, OOP
• [x] create variable template with label, dynamic bg, logo
  • [x] stop using canvas, use html to image
    • [x] #145
  • [x] content on demand (event promo/monthly programme)
  • [x] #146
• [x] rewrite
  • [x] band in event
  • [x] monthly overview
    • [x] animations
    • [x] posters
• [x] then fix these:
  • [x] #135
  • [x] #126
  • [x] #125
    • calculate h of band name + band desc + spacers, place tags under
  • [x] #123
    • html to image should fix automatically
• [x] URGENT #150
• [x] bottom paddings #153
  • [x] check rest of spacings please
• [x] and add these
  • [x] #132
  • [x] #128