+ Skeleton code for dblib::VideoStore trait

For now we are just keeping everything in JSON because the use
case intended here is _not_ to have 999999 clips but like maybe
a few hundred/thousand at most

dblib/src/videostore.rs

@@ -0,0 +1,14 @@
+use std::collections::HashMap;
+use std::fs::File;
+use std::io::BufReader;
+use std::io::BufWriter;
+use crate::{err, DB, dev_urandom, VideoStore};
+
+impl VideoStore for DB {
+    fn new_video(name: &str, desc: &str) -> err::Result<()>;
+    fn del_video(id: String) -> err::Result<()>;
+    fn get_video(id: Option<String>, name: Option<&str>) -> err::Result<VideoMeta>;
+    fn rename_video(id: String, new: &str) -> err::Result<()>;
+    fn redescribe_video(id: String, new: &str) -> err::Result<()>;
+}
+