Somebody sent me a video of you speaking Japanese. You were really good.
I received a video of you speaking Japanese from a friend of mine. You speak Japanese very well.
ーSomebody sent me a video of you speaking Japanese. You were really good.
「ある人があなたが日本語をしゃべっている動画を送ってくれたよ。とても上手だったよ」
video of you speaking Japanese で「あなたが日本語を話している動画」
ーI received a video of you speaking Japanese from a friend of mine. You speak Japanese very well.
「友達からあなたが日本語を話している動画を受け取ったよ。あなたはとても上手に日本語を話すね」
to receive a video で「動画を受け取る」
to speak Japanese very well で「日本語をとても上手に話す」
ご参考まで！
カナダ 
