All your uploaded content must be original and / or have the copyright rights. From royalty licensed music to author rights to freely use or re-use. If the Author or any member reports on a copyright claim, the content will be deleted and your account may be suspended or terminated.

mp4 (H264, H265), jpg, png

We don't re-encode your mp4 files. We advice you to use optimized encoding settings for your video. Or use any encoder and upload up to 5Mbps files for HD quality.

Correct, imported videos can't earn revenue as breakes "Youtube" or other channel Usage policy. Revenue only calculated from local hosted videos. You need to upload full video

It's a unique certificate issues in to your wallet, to proove, that you are the real person and your Channel is really yours, and not from a fake account, or bot. It act's like a mobile signature

You don't need, you still can use for free most of the platform Features, unless you want to start earning from your content as a creator. Convert Loyalty points in to Fiat or Crypto. Have a verified badge, earn from Affiliate links. Crypto Wallet is important for KYC verification and NFT Passport validation to issue the certificate, that you are a real person and not exist in to any sanction lists

You may use hardware encoders or use Old good software one: FFMPEG. just use a comman to encode from Master file to desired one. For Full HD please don't use more than 5-7 MBPS as it may be not enough of internet to play on your devices.

Use the Command to re-encode in to Optimised one:
FFMPEG.EXE -i inputfile.mpg -preset slow -codec:a aac -b:a 256k -codec:v libx264 -pix_fmt yuv420p -b:v 4500k -minrate 3500k -maxrate 5000k -bufsize 5000k -vf scale=1:1080 outputfile.mp4