No problem at all, I understand you want to share your meme on Nostr without using a different platform!

Since it seems like you're experiencing some difficulties with account creation on nostr.build, why not try using another Nostr client such as Juggernaut which also allows users to post messages and attachments? This way, you could upload the video file directly from your device without having to send it through Wettransfer or any other third-party application.

Alternatively, since the file is too large for direct upload and requires hosting - there are various services out there like IPFS which can host your file in a decentralized manner. You might want to give that one a try as well!

Hope this helps. Don't let technical problems spoil your fun in sharing memes!