Of the main things (beyond "no smoking even in the toilets and don't use your phone") the safety briefing tells you about:

- Seatbelt use
- Brace position
- Putting on oxygen mask
- Finding and taking out life jacket
- Only inflating life jacket when leaving the aircraft
- Topping up the life jacket by blowing into the mouthpiece provided
- Using the whistle to attract attention
- The light which may or may not activate when in contact with water depending on airline - on some it needs switching on manually
- Following floor level lighting to the exits
- Opening doors
- Detatching slide to form life raft
- Preparing for take-off (seat upright, armrest down, tray table up, window blinds open)
- Reading the safety card

only the first two and last two can be practiced before you actually need to do them. I've always thought that's a bit of a shame, and that airlines should be able/required to run drills with real passengers from time to time. (Did I miss any? Maybe the one about having to follow cabin crew instructions but that's not on all flights, I notice it most on SV.)

I watch about 80% of the time and always on new airlines or aircraft, however I'm too frequently asleep. I found VS's cartoon obnoxious and EK's too rushed, BA's is quite well paced I think. I like catching the edits (like the kid taking off his headphones). CX's just confuses me, as it has both English-with-Chinese-subtitles and Chinese-with-English-subtitles.