fix unused warning, fix typo

crates/store/re_video/src/decode/ffmpeg_h264/ffmpeg.rs

@@ -887,7 +887,7 @@ fn should_ignore_log_msg(msg: &str) -> bool {
 /// Strips out buffer addresses from `FFmpeg` log messages so that we can use it with the log-once family of methods.
 fn sanitize_ffmpeg_log_message(msg: &str) -> String {
     // Make warn_once work on `[swscaler @ 0x148db8000]` style warnings even if the address is different every time.
-    // In older versions of FFmpeg this may happen several times in the same message (happend in 5.1, did not happen in 7.1).
+    // In older versions of FFmpeg this may happen several times in the same message (happens in 5.1, did not happen in 7.1).
     let mut msg = msg.to_owned();
     while let Some(start_pos) = msg.find("[swscaler @ 0x") {
         if let Some(end_offset) = msg[start_pos..].find(']') {

crates/store/re_video/src/decode/ffmpeg_h264/nalu.rs

@@ -86,6 +86,7 @@ impl NalHeader {
     }
 
     /// Ref idc is a value from 0-3 that tells us how "important" the frame/sample is.
+    #[allow(dead_code)]
     pub fn ref_idc(self) -> u8 {
         (self.0 >> 5) & 0b11
     }