It does work, but I personally find 8 GB RAM a little tight. It also depends on how complex you want to edit videos. Only editing or do you want to generate high-end videos with effects, music and so on. For the latter, I would definitely go for at least 16 GB RAM. More is always possible - but the price or the price-performance ratio of this model is still TOP.
I wouldn't call the screen matt. Rather, it reproduces glossy colours. The brightness is just below the comfort level in front of a window with incident sunlight. The bottom can be removed easily with a mini screwdriver and the various modules are easily accessible. There are 2 memory slots, only one of which is occupied. It's best to order a second slot right away. Processor, SSD and HDD are also plugged in and can be replaced. I think the graphics card is integrated in the motherboard (there are wildly distributed bugs under the cooler plate and nothing plugged in). Greetings Sam