We used to do hardcore content creation on Intel processors and spinning hard drives that were way shittier. Heck even my M1 still 100% suffices for everything I wanna do.
We also used to work fields with our backs and hands, but that doesn't mean we should still do that today when John Deere exists.
I also did my engineering masters on a core 2 duo with 2 GB of RAM, but if I had money i would have definitely preferred something a lot better like an i7 with 8gb of RAM so I wouldn't be constantly hitting the spinning rust SWAP.
My point is, this shouldn't turn into a competition on who suffered the most, doing the most amount of labor with the shittiest possible potato PC, like its happening in the comments right now, as none of these anecdotes proves powerful modern computers aren't useful today.
Pretty sure most of the encoding/decoding of video is handled with special circuits these days.
Now, add enough layers and it'll probably falter, but with dedicated encoding/decoding circuits combined with a modern GPU it will definetly be a usable experience with some lower res quick pre-renders at worst but probably realtime for most content creator usages.
The Macbook Neo has a 2.5x higher multi-core Geekbench score compared to the i7-4960X's, the top consumer CPU of 2013 (which could handle 4K video editing in h264), and its single-core performance is 5x higher. Plus, I'm 99% sure the MacBook Neo has a dedicated video decoding ASIC anyway.