Hi Robbie-d,
Welcome to Sony's Community Site!
We're sorry to hear about this problem that you're having. Since you've mentioned that you've successfully sent photos to your PC, you need to change some settings on the PlayMemories Home for you to able to send videos using Wi-Fi. Here are the steps:
To send videos using Wi-Fi, Open PlayMemories Home app and select [Tools] on the menu > [Settings...] > [Wi-Fi import] > [Wi-Fi auto import], and check the box for [Import Videos].
NOTES:
- Markers (such as smiles, highlight points detected when recording videos) are not included when sending videos via Wi-Fi. To include markers for videos, send videos via USB connection.
- Videos cannot be sent in the default setting.
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Regards,
Dave