Remote violin: posture and intonation on video
Without bow and fingerboard in frame, you fix the wrong problem.
Two angles or one wide shot
A left-side wide shot, or bow and fingerboard in turn. A face-only clip will not fix intonation.
Tune before the take
Ask for open strings pizzicato at the start. Otherwise you chase pitch that a peg lost on the train.
One etude per topic
Do not stack scale, stroke, and piece in one unnumbered week. You get “what I had time for”.