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Dtube but i only have been able to upload one video because on others gives me a wrong hyperlink mess and others the photos on my phone are too big for thumb nail i crop them to make a smaller file size but still i dont know what to do

Just try opening the file in paint and then saving it as a jpeg for your thumbnails. Should be under a MB then. And maybe try messaging the dtube team for help on the hyperlink issue. I usually don't mess with any of that stuff, just upload, title, description, tags and thumbnail. Good luck!