Hi,
Based on the journal from five boots ago, the culprit seems to be that you are swapping hard when the kernel RIPs
Jul 21 22:22:52 Naisa-Linux kernel: Oops: Oops: 0002 [#1] SMP NOPTI
Jul 21 22:22:52 Naisa-Linux kernel: CPU: 1 UID: 0 PID: 191 Comm: kswapd0 Tainted: G
...
Jul 21 22:22:52 Naisa-Linux kernel: ? dm_create+0x2f0/0x5a0 [dm_mod e4bb4525dc837c921740f257aa76c3a30c4bfe68]
Jul 21 22:22:52 Naisa-Linux kernel: ? kswapd+0x1d9/0x370
kswapd kicks in and tries to “rebalance” pages/page faults to disk
So, it looks like you are running out of memory and fast, and the rip happens when hard swapping happens.
What kind of videos are you encoding? Encoding can be very, very memory intensive.
Also, don’t forget to check the health of your disk and RAM.