Fix all compilation issues.

backend/exposition/src/video/handler.rs

@@ -1,14 +1,14 @@
-use actix_web::{get, HttpResponse};
+use actix_web::{get, HttpResponse, Responder};
 use tokio::fs::File;
 use tokio_util::codec::{BytesCodec, FramedRead};
 use futures_util::stream::StreamExt;
 
 #[get("/download")]
-pub async fn download_file() -> HttpResponse {
+pub async fn download_file() -> impl Responder {
     HttpResponse::Ok()
         .content_type("application/octet-stream")
         .streaming(async_stream::stream! {
-            let file = File::open("/home/florian/Video/2019-06-02 17-09-30.flv").await.expect("Failed to open file");
+            let file = File::open("/home/florian/Videos/Kaamelott_Le_film.avi").await.expect("Failed to open file");
             let mut stream = FramedRead::new(file, BytesCodec::new());
             while let Some(chunk) = stream.next().await {
                 yield chunk.map(|bytes| bytes.freeze());