Yes. On Android, the volume level for an instructional video can remain different from the ringtone level. Lowering the ringtone does not necessarily make the video quieter because Android treats media, calls, ringtones, notifications, and alarms as separate volume categories.
Why the two sliders are independent
Media volume covers sound from music, videos, and games. Call, ringtone, notification, and alarm sounds have their own controls. Therefore, a lower ringtone setting can coexist with a relatively high media setting. The volume button depends on current activity. Menu details vary by device and Android version. Android Help explains the separate volume controls.
Hypothetical worked comparison
Hypothetical example: An adult is watching an instructional video. The ringtone sounds too loud, so they press a volume button, open the expanded controls, and lower the ringtone slider. The video does not become quieter because its media slider is still high.
Next, they deliberately press the volume button while the video is playing and lower the media slider. The next part of the video is quieter, while the ringtone setting remains at the lower level already selected. This comparison shows that the two changes affect different categories; it does not establish a universal decibel difference or prove that an app is malfunctioning.
How to check before changing anything
Press a volume button, then open the volume menu to inspect the individual sliders. Identify whether the visible control is for media or for ringtone and notifications. If the goal is quieter instructional audio, change media volume while the video is active. If the goal is a quieter incoming call alert, change ringtone volume separately.
Do not assume that muting one category will silence every sound. Leave important alarm and notification settings unchanged during this media-only check. The practical reading outcome is simple: compare the relevant slider before and after one deliberate change, and note which category moved.