Doom - SIGIL - SIGIL.wad and SIGIL_COMPAT.wad endings are different (1080p)
The first clip (0:00 - 0:27) you see is the SIGIL.wad being completed. The second clip (0:28-END) is the SIGIL_COMPAT.wad being completed. Notice the cool difference.
THE END. *GUN NOISES*
Note that I didn't have played the thing completely as of uploading, still I somehow got this idea. And if you somehow didn't know, the SIGIL.wad is supposed to be played with GZDOOM, the SIGIL_COMPAT.wad is for limited ports, and I presume they also show the thing on the second clip (BOOM does). It's pretty cool though.
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Currently, PSXDRIVERPLAYERBSTH has 1,258 views for Sigil across 5 videos. Less than an hour worth of Sigil videos were uploaded to his channel, making up less than 0.21% of the total overall content on PSXDRIVERPLAYERBSTH's YouTube channel.