Infinite options, remember NOSTR is a protocol not a platform.

Easy: nostr:nprofile1qythwumn8ghj7mn0wd68ytnsv9ex2ar09e6x7amwqyvhwumn8ghj7mn0wd68ycmgv43kktndv5hhyetvv9usqgzn9kpsmllqnsf7wh5tz3wgy4cclsftqqplv8tpayrhwgw8llunevk4p6dz

Self service: nostr:nprofile1q9n8wumn8ghj7enfd36x2u3wdehhxarj9emkjmn99ah8qatzx96r2amr8p5rxdm4dp4kzafew3ehwwpjwd48smnywycrgepndcu8qd3nx36hguryvem8xdr5d56hsmt5xfehzemtxejxkeflvfex7ctyvdshxapaw3e82egprpmhxue69uhkc6t8dp6xu6twvaex2mrp0yhxxmmdqqsfnz2sqsflkatdssmeztxr90s8xrd7r07xkhfwaa6eu9zkcguljpg0va3vj

In reality you can upload your video to any public cloud service, such as iCloud or Google or even your own server, say a VPS or an open source project like NextCloud.

Once your video is available as a link on the Internet, copy that link, paste it into a new note along with the text you want, et voila 💪