Hudl as the brand, company and product is always spelled just like that — never all lowercase or all caps.
If you’re talking about Hudl as a brand or company, feel free to use first person: “Hudl is hiring! Come join our team.” (Note that Hudl is always singular.) Some exceptions to this include content like press releases and content written for external partners.
If you’re talking about Hudl as a product, third person is the way to go: “Hudl is the industry-leading platform. It provides teams with video and data.”
When writing a URL, use all lowercase letters: hudl.com/your-link-goes-here.
When referring to Hudl.com as a tool within the product, use the capital “H”: “You can upload your video to Hudl.com.”