edit 14.05.2020: 6.2.3 is back online as v25426, for newer coffeelake cpu's with problems using hardware transcoding (dev/dri present after boot) there is a new videostation that fixes the problem
for Instructions about installing or updating please read "Driver extension jun 1.03b/1.04b for DSM6.2.2 for 3615xs / 3617xs / 918+"
if i have time i will write more in this place
the new package is not well tested i just did some tests with hardware i have at hand (ahci, e1000e, r8168, igb, bnx2x, mpt2sas/mpt3sas) and tested update from 6.2.2 to 6.2.3
basically synology reverted the kernel config change made in 6.2.2 back to what was before so old drivers from original 1.04b loader (and older driver i made before 6.2.2) should work again - but as synology also introduced there own new i915 driver with 6.2.3 there will be a conflict when jun's i915 driver is loaded with 6.2.3
there are two positive new things, synology released a nearly recent kernel source code (24922) and 6.2.3 has a new i915 driver supporting as much gpu hardware as jun's backported i915 driver in loader 1.04b - so there is no need for jun's i915 driver anymore and in theory we should have good support for apollo lake, gemini lake and other newer hardware but it seems not all new UHD630 is supported as there is dev id "3E98" unsupported (i5-9400, i5-9600k, i7-9700t, i7-9700), ark.intel.com and wikichip.og are usually good sources to check the id
coffeelake cup's without driver support (no hardware transcoding), SKU numbers should be listed when buying and can be checked on the box
i9 SKU S82
i7 SKU S82
i5 SKU S6f2
a new 10th gen i5-10500 / i3-10300 have device id's "9BC8" and there are no "9xxx" numbers in the driver we use so don't expect any newer gen10 cpu to work with hardware transcoding even when it "only" has UHD630 igpu