You're right, they can't be turned off - but you will eventually learn to place/move your cursor so the pop-ups aren't in your way.
Notice that the pop-up always occurs below and to the right of where the cursor first makes contact with each timeline item. The pop-up stays fixed in that location until you move to another clip, and that works to your advantage.
If a pop-up shows up in an inconvenient place, simply move the cursor off the clip momentarily while moving it left or right so when you swing it over the clip again the pop-up is in a completely different location.
With a little practice, you'll do that instinctively (and hopefully almost subconsciously) so it won't affect your editing flow.
YouTube/optodata
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