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Depending on the resolution, video duration, codec, container format, frame rate, etc., you might fail to upload videos to YouTube.
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YouTube supports HEVC H.265 video uploading (hasn’t announced official support). It is able to offer decent video quality and is good for video storing and streaming. MP4 is the most popular video container format for a video to store and stream videos over the Internet.
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When the file format of your video is among the supported ones, you can make things better by picking the best video format for YouTube 1080p/4k. Check out the format of your 1080p/4k video before uploading them. If YouTube does not support your video format, you will receive an error message saying "Invalid file format". After receiving the videos, YouTube will process them and make them faster to load and stream while keeping the best possible quality. Videos of different sizes, resolutions and formats are uploaded to YouTube. David Taylor, David Newman, and Brian Schunck, GoPro
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