In UE4.27 I can not use a .mp4 video anymore, only a bink video file. The RAD Video Tools give me only a bink 1 video file instead of 2.
yes it is hard to understand, Epic buy and did the integration of bink with bk2 file only.
BUT you have to pay a license (when rad what to respond to you) to export a .bk2 from their radtools.exe
I just what to compare h264 vs vp9 vs bk2 on an Android device with big resolution…
it is too sad that h265 and av1 or not integrated in Unreal