Just edited the github issue with this info:

• Running find -type f -print0 | xargs -0 truncate -s 0 in game\dota\panorama\videos and game\dota_addons worked, all files are truncated to zero size and game works without any issues.

I run the game with no intro video, if you need intro video, you can keep it, it's located in game\dota\panorama\videos folder.