Watching videos of TVs never gives you a good idea. Such videos are best avoided for comparison since the TVs will look very different in person, and especially in your own viewing conditions.
Screen burn is not covered by warranty on the C1. The G1 has a 'panel warranty' which is said to cover it though.
The risk of burn in has little to do with whether you are a gamer or not, but more to do with what games you play. Think if you play a lot of games with bright static huds like FIFA OLED is probably not for you, but if you don't OLED is fine. Even with high risk games like FIFA you'd need to be playing those 20h a week for it to be a risk in 4-5 years.
See
OLED Burn In Risk for more detail.
Also think about your viewing conditions and personal preferences.
Like a bright impactful image? Go for an LCD TV.
Like a more refined image? OLED
Play during the day a lot? LCD
Dislike motion blur? OLED
Dislike motion stutter? LCD...and so on.
Also consider you're only shopping for 2021 models which are expensive currently. This time of year you will need to overpay for new stock, whereas 2020 models like the LG CX or Samsung Q90T may be cheaper. Delay your purchase if you want a new model to not overpay, or buy last years stock at discount.