Is the Core i7-1355U fast enough for video editing?

It handles light trimming and 1080p edits, but sustained 4K editing and rendering are slow on its integrated graphics. A laptop with a dedicated GPU is the better fit for that work.

Can the RAM and SSD be upgraded?

The SSD is user-replaceable, and memory slots vary by mainboard, so check the service manual for this exact configuration before buying upgrades. With 64 GB and 2 TB fitted, most buyers will not need to.

Is the touchscreen worth it on a 15.6-inch laptop?

It helps with scrolling, forms, notes and casual browsing, and Windows 11 is touch-friendly. If you mostly type, a non-touch panel with better brightness may serve you better.

How does it compare with the Inspiron 14?

The 15 gives you a larger screen, a number pad and more room for cooling, at the cost of weight and battery life. The 14 is easier to carry but has a smaller display.

Does it have a backlit keyboard and fingerprint reader?

Backlighting and the fingerprint reader depend on the configuration; confirm them on the exact model listing. Many Inspiron 15 units include a backlit keyboard but not a fingerprint sensor.