This version is worked for me!

It looks like the libcef is from spotify autobuilds, but it doesn't support h.264 decodec. If there are any chance of buiding a ffmpeg support libcef.

The CEF binaries were actually built by me on my hardware for Windows, macOS, and Linux using branch 4324.

Due to licensing reasons, I cannot provide precompiled CEF binaries with H264 and other codecs.

I will, however, soon be releasing a separate project "mcef-codec-patcher" which will provide a python program and binary diffs between the non-codec and codec versions of CEF. Using the python program, you will be able to patch your CEF binaries to include proper codec support (with Chrome branding).

In theory, this does not violate the license because I will only be providing diffs between files and the end user will be compiling the final product.

Thank you for relaunch this project.
Looking forward the patch.