Testing playback on a phone before you send it
Okay. You've got a video that's exported now, the right length, right settings, and I know the temptation here. The temptation is to be done. You did the work, the file exists, ship it.
Don't ship it yet. Not until you've watched it on an actual phone.
Here's why this matters more than it sounds like it should. You've been looking at this video on your computer this whole time, probably on a decent-sized screen, probably with headphones or real speakers. That is not how your mom is going to watch it. She's going to get a text with a link or a file attached, she's going to tap it on her phone at her kitchen counter, and she's going to watch it through the phone's built-in speaker while something's going on in the background. If it doesn't work in that exact situation, it doesn't matter how good it looked on your laptop.
So the step is simple. Send the finished file to your own phone, or to a family member's phone if you can rope them into it, and actually watch the whole thing there before you send it anywhere else.
What you're checking for
A few specific things, in order:
Does it play at all. Sometimes a file exports fine but the phone's video app chokes on it anyway, especially if you picked an odd format. If it won't open, you need to know that now, not after Grandma's tried three times and given up.
Is the orientation right. I mentioned early on that my very first project came out sideways and I edited the whole thing before I noticed. Phones are especially bad about flipping this on you again during export or transfer, so don't assume it's fixed just because it looked right on your computer. Watch it upright, on the actual phone, held the way a person actually holds a phone.
Can you hear it without cranking the volume all the way up. This is the one I care about most, honestly. I've said audio matters more than picture, and this is where that opinion gets tested for real. A phone speaker is tiny and tinny compared to your computer. If the narration was already a little quiet, it might disappear entirely here. Turn the phone volume to a normal, real-life level — not max, not near-silent — and see if you can follow along without straining.
How does it look on a small screen. Titles that looked fine and readable on your laptop can get cramped or blurry at phone size. Check that any text you added is still legible. If you have to squint, so will everyone else.
How long does it take to load or download. If the file's still bigger than it should be, this is where you'll feel it. A slow load on wifi is annoying. A slow load on someone's cell data, especially someone with an older phone or a spotty connection, might mean they never open it at all.
A quick story about why I take this step seriously
Michael, my husband, was on a work rotation out in North Dakota when I finished the video I made about his grandpa. He wasn't home, so I did the thing you're not supposed to do, which is watch your own finished project alone, at 11pm, at the kitchen table, with nobody to react with. I cried through most of it. Then I did something I'm a little proud of: I didn't call him and dump all that emotion on him over the phone at whatever hour it was there. I sent him a plain two-line text saying I'd finished it and I thought he'd want to see it.
He called me from his hotel room twenty minutes later. He'd watched it on his phone, standing in a hotel room in another state, on whatever wifi they had, through his phone speaker. If that video hadn't played cleanly on a phone, hadn't been audible in a room with a hotel air conditioner running, that moment doesn't happen the way it did. He gets a spinning loading wheel instead of his grandpa's voice. That's the whole reason I check this every single time now, no exceptions, doesn't matter how tired I am of looking at the project by that point.
If something's wrong
If it doesn't play, check your export format first — that's the most common culprit. If the audio's too quiet, go back to your audio settings before export rather than trying to fix it by asking everyone to turn their volume up; that's putting the work on the person watching instead of on you. If the orientation flipped, re-export and check again. Don't send it and hope. I've watched people do that and then get three confused texts back asking why it's sideways.
Before next time
Send tonight's finished video to your own phone and actually watch the whole thing on it, ideally with a slightly annoying amount of background noise going, the way real life usually sounds. If something's off, we'll fix it together before you send it to anyone else.